I really wonder why do we make predictions about Pokémon, even though they're pretty powerless because we aren't the designers. Why isn't there a way we can ever make mature suggestions to GameFreak? I put in mature to the question because GameFreak can't take us seriously if we sent in a crappy drawing of a blue horse and said, "Make this a Pokémon!". If we could have such an option in the design of new Pokémon, however, there should be a small amount of suggestions actually put into action so there aren't many spoilers.
Non-rant-wise…
All Pokémon this gen look lik they have decent potential. I say this because of the amount of unconventionality of them compared to other starters.
Chespin is the first Grass starter to not be based off a reptile, but a mammal.
Fennekin is a fox Pokémon, almost like a rodent, but still different than Cyndaquil, who I didn't even know was supposed to be a porcupine.
Froakie is a more familiar amphibian as a frog and not like an axolotl (Mudkip).
However, all starters are unique. Still, I would really like to have all three starters in my Pokémon X/Y run like I did in Black, no matter how their final evo looks.