I think eventually D.va will become one of the most important characters in the game lore wise. My theory is that the war that Talon is trying to start will involve Gwishin. Talon will somehow make allies or take control of the Gwishin and help them break through the MEKA squad. This will spark a new omnic crisis that will spread across the globe and bring all of the characters together to ultimately defeat the Gwishin and Talon.
If this were true I would also imagine that Symmetra would also become incredibly important. She would discover the Sanjay is working for Talon and has a huge inner conflict of what to do, she would eventually decide to help stop the war and kill or subdue Sanjay and bring down Vhiskar.
Junkrat and Roadhog would be trying to do something with Junkertown and they would witness it’s downfall. After the destruction they would enter to try and scavenge loot, and run across the Queen, they would group up to help create an uprising against the Gwishin in Junkertown.
Hanzo would try to stay out of the conflict, but Gengi comes to attempt to persuade him into fighting with him and the OW team. He would refuse, but the Gwishin would, at a very convenient time, attack Hanamura having Hanzo realize that he needs to fight the Qwishin.
Sombra would be uncomfortable with the war, but choose to side with Talon. However, once she see’s an attack Dorado, and the Bakery getting blown up, she will betray Talon, bring multiple plans to OW and would use her hacking skill to help the team take down the Gwishin.
Torb and Bastion would be ambushed while traveling, the Gwishin will attempt to abduct Bastion and “fix” him, but Torbjorn will save him strengthing that bond, they would be picked up by Winston and go off to fight. A few people would be uncomfortable with a Bastion unit, but decide to work with him.
Zarya will discover that Katya Volskaya cooperated with the enemy to get new tech, the black mail Sombra showed Katya, and that Katya helping Sombra was one of the reasons Talon was able to take control of the Gwishin. She would ultimately help drive out the Gwishin from Volskaya Industries and then Katya shows her that OW was fighting the Gwishin around the world and travels to help fight.
Ana and Soldier will be confronted by Reinhardt. Ana goes, but Soldier 76 will hesitate to join OW and not show up. However in grave moment where Ana, Reinhardt, and Brigitte are about to get over run soldier comes to support them and they wipe out the attacking forces. Soldier then will go just to fight the fight, but he’s out right after.
After getting soldier to join Ana heads back home to try to get Pharah to stay out of the fight. While traveling there Temple of Anubis is attacked and Pharah is deployed. She discovers the Gwishin are attempting to the Anubis AI and with a last second decision she rocket barrages in a cotained area with the whole Gwishin force trying to open the temple. She stops them, but becomes incredibly injured. Ana arrives just in time to save her and get her to safety, while recovering Pharah explains that Ana doesn’t get to chose where she goes and Ana accepts that Pharah will join OW in the fight.
Mercy hears of the fighting on TV and leaves immediately in her swift response suit to help. While leaving Moira enters and attacks her. The battle and the whole time Mercy’s suit is warming up, right before Moira gives the final blow Mercy’s suit recharges and she uses Valkyrie to fend off Moira and force her to retreat. Mercy then takes off to frontlines.
Lucio would be doing a show in Rio when the Gwishin attack, his theatre is attacked and he rushes back to to equip his armor and grab his sonic amplifier, he takes out he omnics in the theatre and then rushes out to see a city in flames. He rushes into the fighting to encounter Sanjay, before Symm’s betrayal, and Lucio is beaten, he is saved last second by symm who is hiding her identity to Sanjay. She then left to go back to Vhiskar where she then kills or sub dues Sanjay.
Mcree will be wandering around the world when the first attacks happens. He heads off to join the fighting, after an impressive defeat he realizes they need more forces. So he travels to Route 64 to recruit the Deadlock gang, of course they laugh him off he beats up the gangs leader, and shows them what the Gwishin have done and can do, after telling them that it’s either fight with the chance to live or to sit around and wait for death, they go with him to join the fight.
When Nepal is attacked Zenyatta rushes forward to help survivors, where he is ambushed by some of his fellow monks of which Gwishin took control of. He his beaten and taken control of. Later her would be saved by Gengi and Sombra, with Sombra wiping out the virus. This will allow Sombra to get into the Gwishin database, coding ,etc which will allow her to mess up Gwishin connections and allow OW to have the upperhand.
Winston and Mei grouped up awhile ago and when the fighting started the began going around recruiting people to the new OW. While this is happening they are confronted by Doomfist who has a personal anger towards winston. They fight with Winston losing only to be saved by Mei who freezes Doomfist, they put him a cryofreezer, putting him out of the fight.
Orisa stays in Numbani to protect the city and Efi. During an attack Efi realizes Orisa needs to go the frontlines and begins to build more defense bot and security precautions. She sends Orisa away, which confuses Orisa but she listens to Efi and goes. On the frontline she sees what war is truly like and begins to grow up a little bit.
This whole time Talon is going around attempting to assassinate OW agents before they can jump into the action. Maximillion will be the main controller of the Gwishin, with Doomfist helping plan attacks and strikes before the Mei encounter.
During this time Widowmakers mind control would be wearing off and throughout she would try to cope with what she had done, while trying not to alert the other Talon operatives that the mind control stopped working. The entire time she will have chances to kill off other main characters but stops and gives an excuse to Reaper. In the end during the final assault she betrays Talon and commands every computer piloted drone, ship, and weaponry to crash into the Gwishin, including the main ship (the one she and Reaper would be on.) She would die, but Reaper would survive thanks to his wraith form. Although he would be incredibly injured.
Widows assault on the Gwishin would create in opening in it armor, Sombra notices this and alerts everyone on the team. D.va decides to fly her mech up to the hole and enter with plans to blow out her mechs reactor inside. However, she falls into a trap, and is unable to escape. She orders Dae-hyun to blow the reactor, although he says no at first, he follows her orders and blows the reactor. D.va dies but the Gwishin would die, and explode on the battlefield, including all of it’s smaller drones and bots. All the omnics that the Gwishin took control of would be free and the crisis would be over.
Reaper will enter the battlefield weakened from the crash and be surrounded by the new OW team. He would try to resist, but Soldier finally puts and end to Gabriel Reyes.
After the crisis OW would be reformed, and Talon would fall apart leaving the world at peace.
