Same.
I thoroughly enjoyed the first, I played the second but found it lacking and this is leaning towards worrying - for me anyway. Plenty of time for that to change but I was disappointed by the second which is factoring into my interest of this one.
That whole trailer just strikes me as trying too hard to be weird and wonderful...
The whole floating city thing, especially since its a prequel (Columbia was built in 1900, the game is set in 1912 according to IGN), makes even less sense than the city under the sea. All i can expect is that it'll turn out at the end that you're the 1 who builds Rapture.
Honestly why even connect this to Bioshock other than the fact they can obviously try and play off its IP for a little hype. Its in the same universe as Bioshock but i don't doubt they're gonna make up so much rubbish that it'll just see stupid because by the looks of that trailer the core gameplay is pretty much identical.