Also remember that thanks to … ‘reasons’ I guess, Wrathion’s content and explanation for his motives in MoP were all removed when the (First) legendary cloak was taken out. Plus him hatching and stealing the egg from the Red Dragons was Rogue only content for the legendary daggers, which so far I have personally seen no callback to it with the BFA interactions, there is not much really to go on with him now.
I mean I think the list of events that one can still see it goes:
- Cata Era Badlands quests where you meet Rhea, cleanse his egg of corruption.
- Cata Era Rogue Only Legendary dagger quests that is muddled if it is/was ever canon in certain parts.
- Removed MoP Content.
- His involvement in the War Crimes Novel.
- One little mention of him in the start of Warlords I believe?
- Legion I think he made a cameo near the Black Dragonshrine in the Chromie scenario that really does nothing.
- The dude just shows up in 8.3 with the answer to all of our prayers.
If someone just played the game and say. skipped MoP? They would really have no idea who Wrathion is or that he anything to do with Warlods and the Legion