It does seem annoying at first. But a good game makes me look over that. I prefer 16/32 bit like you also but only when the sprites are well-made and detailed. Graphics aren't everything for me but it does help me like the game more.
I don't think it's real, since I read this, http://www.gamefaqs.com/boards/631516-wii-u/69430346. But it does say it's possible?
this counts only announced stuff. I think its safe to say that Retro's next project and EAD's next mario obviously aren't ready to be shown yet given how recent...