Coming November 16th to the Nintendo Switch, it's Pokemon: Let's Go Pikachu! and Pokemon: Let's Go Eevee!
https://www.youtube.com/watch?v=9jRtpMKLsts
I, for one, can't wait!
To be honest, I want to lean towards the Eevee Version, if only for the unique concept of starting with a Normal-type.
One thing I have predicted that will happen, even if a good chunk of the Pokemon Community doesn't believe it, is that the Eevee you get as a starter won't be able to evolve within the game.
You see, this is all looking to be a remake of Yellow Version. In Yellow Version, your starter Pikachu could not evolve within the game. You had to trade it to Red/Blue and evolve it with a Thunder Stone into Raichu. After which, you could trade it back.
If they plan to make the same thing happen, Pikachu not evolving in the Pikachu Version, then it would only be fair to make Eevee not evolve in the Eevee Version of the game. Otherwise, well you can guess which one everyone will buy.
We'll see if my prediction is correct.