My opinion on this is directly tied to how much of a sequel this actually is.
I'd like to believe you actually get to start with your B/W team or something of that sort develop the originak story, but that kills part of the trading system from the series as well as making it weird to make a full fame for the 60-100 pokemon levels, plus the fact that Unova isn't really that big or interesting of a region to warrant a full game.
I read somewhere about the possibility of going to Hoehn via the Airport but that just seems like a shot in the dark, since after Silver/Gold we really didn't get a two region game. What I would really like to see is more challenging end-game content that wasn't just a one.off match or something of the sort, most fun from playing pokemon are using your late-game teams, but so far, other than fighting the rigged battle towers and all that jazz I've felt that the games were weak in that aspect.
This aside, the Legendary alt formes are ugly imo, but this batch also has a bit of weird design choices mixed with some really good design of pokemons.