Personally I want 2.5D classic'vania with simple, but solid gameplay, with beatiful art, interesting levels and castle, that takes only 1/3 of the game.
What I expect is just another "metroidvania" clone, with 40% sprites lifted from previous games, taking place in a giant horribly designed empty castle, devoid of any idea or soul. Decent art (maybe) and nonessential storyline, overdriven with animeish elements. Oh, and the basic storyline must include elements from Circle of the Moon. Again. Just because.