I noticed something in the new games that seem to suggest that Nintendo and GF are planning on making remakes of Ruby and Sapphire. AGAIN, THIS IS SPECULATIVE.
This page is all of the sprites from BW. Look at the previous generations' final evo starters. Gens 1, 2, and 4 are all only slightly redesigned from the sprites in Gen 4 (Shame they didn't use Charizard's HGSS sprite). But Hoenn's Starter evos were completely redone. I wouldn't jump to conclusions, but that's certainly eyebrow-raising.