I wont be as long as the game is good. Also that leak is bs. For one it's trying to correct another leak, something I've never seen a real leak do. This zero credibility nobody is clearly just trying to leech off for attention by saying what we want to hear. Contradicting the credible leaks by saying the game is gen 8 without any sort of backing is laughable. And finally, ruining the point of Eevee and giving Pikachu a 4th evolution stage.
To be fair, it could be what I mentioned and they turn Pikachu into Eevee and give multiple final stage evos. You already have to evolve Raichu via thunder stone, so a fire, water, and grass type evo via those stones like Eevee wouldn't be that far of a stretch. And obviously we're gonna get new Eeveeloutions in a game where Eevee is literally the mascot. That would make no sense otherwise. But yeah, this just seems like some random person with no credibility so probably fake.
They specifically said Gorochu, Raichu's scrapped evolution. Regardless of this fake leak, I'd say Eevee wont get a new evolution. Again, this is not a new gen a.k.a. no new Pokemon, plus it wouldn't be fair to the Pikachu version since he can't get a new evolution. Don't see how being on the boxart only makes sense if you get a new evolution. That didn't stop Pokemon Yellow.