Normally I don't post about news that have the potential to be fake, but quite frankly, should this be fake, it's at least done well enough for me to at least point it out. Unconfirmed concept art for Chespin's and Fennekin's final forms has emerged on Tumblr, and while we have no clue if it's real or not, I still like the look of it. The parallel between Chespin and Oshawott, if true, would hold up rather well, to the exception that Chespin stays bipedal all the way through, while Oshawott's line was screwed out of Ice Punch and other such moves. And, needless to say, Fennekin DOES look like it might evolve into a Fire/Psychic, especially since it was confirmed to know Psychic to begin with.
I'd also like to point out that Servine and Dewott also were leaked through concept art several months before BW1's release, so a repeat of that is perfectly doable.
(Also, here's a zoomed-in version of Chespin Mk III's colored picture, just because.)
Oh, and what about the ghost sword Pokémon, you may ask? Well it definitely looks cool, but I'm wary of getting excited too quickly. I remember the last time I got hyped over a Steel-type pre-release... it did NOT end well.