Oh please, like that’s going to happen. They’re totally going to remove a playable race-and-its capital city and give it to the Alliance. Because that’s totally balanced.
Yeah, you do know that it has already been repaid, right? There was this guy, called Anduin Lothar, you might have heard of him? He was the last person who the Elves owed a debt to, and they repaid it. He has no issue, so the Blood Elves don’t owe anyone diddly squat since the Second War.
When did the Nation of Quel’thalas ever belong to the Grand Alliance? I’ll save you from looking it up. The answer is -Never-, They were part of the Alliance of Lordaeron briefly, but that rather famously no longer exists.
Hard to betray an organisation you never belonged to…
They’re not going to do that though. In lore, Lor’themar was in talks with Varian Wrynn about about doing so, but that was story fluff, and Jaina put an end to that idea. We can see this when Alleria visits the Sunwell and Lor’themar gets his usual sass on, when she suggests the idea. If LTT was willing to enter into talks with Varian, who was fairly bloodthirsty, yet now scorns the same offer made by his peace loving son, that goes to show just how royally annoyed the Blood Elves are about the whole Dalaran thing still.
Besides, the logistics would be a nightmare, disruption of Guilds, Raiding groups, RP, it just wouldn’t work.
Now giving the Alliance something snacky and new might work, as races go, but sadly for Alliance fans, the most highly demanded is -still- High Elves (Which is ridiculous, as they’ll be able to look like one in all but name, come SL)
You’d have to look at what desirable races would make sense.
Naga make no sense, apart from the models being a nightmare, they aren’t going to join a faction with Night Elves in it, nor would the Night elves accept them.
Gnolls hate the Alliance. Stormwind is Gnoll land.
Kobolds don’t seem likely to join anyone.
Vrykul don’t make any sense, plus they’re just big humans. I mean literally that is all they are.
Broken/Krokuul could make sense, but what do they really bring to the table that the Draenei don’t?
Tuskaar could make sense, but the problem there is that they are too ‘ugly’ for Alliance players to want to play them (This is largely why they get stuck with human-like races)
At a pinch Arrakoa could work, flightless or flying ones, I mean the flightless ones do have a thing for Shadow, and now the Alliance have Void Elves a marriage of convenience could be made, likewise the Flying ones are more likely to go Horde, as whilst the Blood Elves do not worship the Sun, it does have a place of reverence in their culture.
Murlocs aren’t going to join anyone.
Ogres are Horde.
Centaur do have an enemy in common with the Alliance, in the form of the Tauren, but would that be strong enough reason? Also, just think what a nightmare their model would be, I mean how would a Centaur even sit on a flying mount?
Faithful Sethrakk is a possibility, and could be done, yeah, helmets on them would look stupid, but just take the route they have with several races and boots, they can equip them, but they won’t show. That’s probably a strong contender.
Saberon? Ehh, too similar to Worgen, and also why on earth would the Saberon side with either Faction on a world not their own? We also don’t know how smart they are, “Ahh, Champeyun! Azeroth’s Wounz need ta be healed, Kin yeh stop lickin’ yeh privates fer a moment?”
Confused cat noises
Jinyu are a possibility, or Ankoan, the two are largely the same, and both do have favourable relations with the Alliance, and have the allure of looking non-human enough to appeal, whilst also making lore sense Either of those are strong contenders.
Saurok are out of the question, they’re biological experiments gone wrong that love living in fetid squalor such as would make an Orgrimmar sewer look like a high society banquet hall.
Hozen would jump Horde side. (Probably literally)
Eredar? Heh, no, Alliance already have two flavours of Eredar, given that that is the actual racial name of the Draenei species, and I can’t see them playing nice with those Eredar who supported Archimonde and Kil’jaeden. (Or anyone playing nice with them for that matter)
Mogu hate everyone. Like everyone. They wouldn’t join either Faction because of the Tushui and Huojin.
There aren’t many more I can think of, to be honest.