Well yeah, High Elves and the Silver Covenant would work well with Night Elves. By definition these are not the same people of Silvermoon who categorically rejected the Alliance. By the time of BC and Wrath, the Alliance was practically one big happy family. Dreanei to Gnome and everyone in between. They also, largely, did not experience the same traumas and difficulties the Blood Elves faced in those 6 years from WC3 to BC. They’re not having a civil war among survivors, sucking arcane and fel to survive, putting down initiates because they’re too weak, culling hordes of undead, and falling into wretched in mass.
If you’re referring to Suramar, sure but begrudgingly just as they stood with the Night Elves. This is little different than what I had already suggested that if what is coming down the pipeline is just a shared defense of the Sunwell just as we all defend Nordassil because the threat faced was greater than what any could individually muster. This was also Suramar - kin of them all, in one way or another, isolated and preserved since the Sundering. None of them have seen it since then, if at all. Its almost like rediscovering some ancient ruins, everyone wants to see them. Except people still live there and actually have a large scale society.
And even this was met with disapproval from Lor’themar.
Silvermoon Messenger says: I bring word from the Regent Lord of Silvermoon
Silvermoon Messenger says: Lord Lor’themar demands an explanation for the presence of this… exile in our lands.
Vereesa Windrunner says: Quel’Thalas is as much my home as it is yours and I would not see it fall to our ancient enemy. Now, you tell your cowardly regent –
Halduron Brightwing says: Vereesa, please!
Halduron Brightwing says: She is here at my invitation, courier. Most of my Farstriders are away and cannot be recalled easily. Vereesa’s rangers know the land and they are experienced combatants.
Silvermoon Messenger says: Lord Lor’themar does not concur with your reasoning, ranger-general. You have no authority to invite this –
Halduron Brightwing says: I am the commander of Silvermoon’s defenses and I will seek assistance as I deem necessary!
So sure, they worked together but had Halduron not gone above Lor’themar, they would never have been invited. Despite Halduron’s claims, Lor’themar probably does have authority above Halduron and could have vetoed it outright if it was worth the hassle.
What is the need? Truly, what is the need for them to unite on this basis? Suramar is shown as a wholly arcane and magic society with little religion or or serious belief in Elune to foster a connection on those grounds. Outside of Nightborne being able to play priests, we’ve been struggling for years to find that connection to little avail. Unless they’re looking to proselytize, which I can’t imagine would go well, its just another Horde city. This was all before Teldrassil too. You don’t let that go so quickly.
I really just dont see any of them feeling a need to unite and decided their future on a pan-racial basis. They clearly have not wanted to for the past 30 years and relations, while closer at some points, are strained to say the least. These are deep political divisions that aren’t going to be overcome easily and should remain. Of course if Blizzard wants to write it in, they have the power to do so, but given what we’ve seen, read, and played, they really shouldn’t begrudgingly come together for more than world survival.