I'm pretty sure that all of you that played GR know that the way it ended it's pretty sure there'll be a sequel. So, what do you want in it? How do you want it to be?
I would love more of the same, but improved. I want a longer story, actual voice acting (with an option for those that want the original version), more puzzle-esque situations that force you to think about how you use your gravity powers (I think the game could have done so much more with your abilities, it's great, but there was room for so much more), more information, development and backstory of the characters, the reveal of the mysteries left in the first game, improved graphics, and well...what do YOU want?