I think the concept is a little far-fetched in my opinion. The game is set in 1912, it just seems a little odd that technology would have been available to allow buildings to fly for whatever reason any utopian thinker may dream of. Although, I am sure they will make a fantastic attempt to explain it. I just think that I won't be able to suspend my disbelief enough.
Secondly, the character ART style looks like it came from the Shrek movies or something.
Third, if its a rethink of everything why is there a being that is analogous to the big daddy of previous iterations of the series?