Yes, anything is possible. Including the likelihood that your fear of the majority of a player base will want to be Nords in the Covenant. However, let's say you're correct. Let's say that, on opening day, the majority of the Covenant's population are Nords. That would mean that Zenimax made the correct call in allowing players to play any race in any alliance.

It will still be a splash in the pan within the alliance because we will be playing on mega-servers. The only time this will seem slightly odd is if you are matched with or against them. Even so it is nothing more than a one off community which could exist in the world of Tamriel anyway and therefore they are simply just that: a small community if immigrants to another area of the world.

How is that the correct call?

Something you learn early on is that what the player wants isn't always the best thing for the game. Clear defined factional boundaries in a game literally defined BY its factional boundaries is a good thing, not a bad thing.

Just because something is a molehill doesn't make it any less important than a mountain.

i hate the fact that the devs changed their mind so to speak. they kept pushing split factions then boom, alliances are pointless

If, in your most darkest of fears, that many people actually end up playing Nords in the Daggerfall Covenant, then it would mean that Zenimax made the correct call in allowing it to happen, because it would be absolutely idiotic for any company to not make that many people happy. No, sometimes what the player wants isn't always the best thing for a game. At the same time, what you (the generic you) don't want isn't always bad for a game.

Because blurring the factional lines that are the literal basis for PvP (a major point of the game) is obviously a subjective feeling in my gut rather than outright concern for the gamer's overall longevity by not sticking to its preplanned initiative.