We're not in ivalice. The fact that we'll have a raid named "Return to Ivalice" does not in any shape or form imply that.
The fact that humanoid races can in very special conditions summon a primal has absolutely nothing to do with the fact that the story is and remains based on a very strong contrast between humanoid races and beastmen.
Keep believing it can happen you want. It's no skin off my back, but there won't ever be a beastman warrior of light, member of the scions and so forth. It simply doesn't make sense with the story so far, which will still be available and playable for the foreseeable future.
If they'll consider bringing a race from Ivalice, Square Enix will go where the money is, which is the absolutely logical thing to do with a MMORPG entering its maturity years. And I'd say that there's absolutely zero doubt that the number of people who would be attracted by the possibility of playing a Fran-like character massively overwhelms the niche who wants to play a lizard.
