I've got no reason to believe the list is real, it's just some names thrown in with typings and nothing to concretely back it up. Yet with the final evos leaking so early, and everything this game is changing up, god knows. I just want the Dormala name to be true if anything haha.
Edit - I will say the absence of Fossils is interesting. You'd think a fake leak would have them to give credence to it and back it up, but I guess the absence could also be a way of getting attention too. I think though, whether the list is real or not, multiple final evolutions for the starters is the way to go. I originally wanted variants, but starters are a whole other kettle of fish compared to the other Pokemon. Their typings and appearance are arguably more iconic, and changing Charmander to, say, a water type might not go down too well. Not to mention they're not found in the wild in game, thus where would they have adapted to? Still, variants seem to be a massive new feature, and I can't see the starters not getting something new and shiny to compensate for it. Multiple final evo's seems like a nice way of having a fresh take on them yet still keeping their recognizable traits intact.