It’s sort of too early to tell. The designs look a little bit generic, but that’s how they tend to start off; I’d really need to hear how they evolve.
The whole chestnut thing they seem to have going with Chespin is amusing enough. I’d like to know where you heard this about a mole and a knight? If you look at Chespin’s various names in other languages, it seems like they’re working off a hedgehog, not a mole (reasonably enough, since we already have mole Pokémon but not hedgehog Pokémon) but a knight is certainly possible.
EDIT: I stand corrected: Shaymin. Still, I think we can all agree that nobody cares about Land Shaymin.
Fennekin… well, my biggest worry with Fennekin is that she’s going to be Vulpix. There’s plenty of room in the design for her not to be Vulpix if they choose to take it in another direction, but the fact that she uses what seems to be a Psychic attack in the trailer makes me… uneasy.
People are making all kinds of predictions about Froakie, and saying he’s obviously going to go into Water/Flying because of the white parts on his body that look like fluffy clouds, and while that could potentially be interesting, I think the white is just as likely to represent foam, so… *shrug*
The bottom line, for me, is that people all over the internet are going to be wildly guessing at what these three are going to turn into. By sheer dumb luck, some of them are going to be right, but they don’t know, and neither do I, and I don’t much care to join in.
Pokémaniacal 