I think that BW will end sometime next year, either in the summer or in the fall, depending on when the sixth generation games come out. Considering that they've already revealed Genesect and it's being distributed earlier than expected, it seems like the next generation is moving it pretty fast. I don't think that there would be any remakes in this generation. I think that they'll save those for after the first sixth generation games come out. I'm not really sure about what they'll do after the Unova League for the anime though. I definitely can't see Ash going into a Champion League, even if it's handled like the BF arc was, since I still can't see him winning the Unova League. The idea that they could use a Wii U game to adapt for after the Unova League sounds pretty cool. I'm not sure how likely it is, but that could be interesting depending on what happens in the game and how the anime deals with it.