Ugh. Bioshock was already a great story told perfectly through the interactive gaming experience itself. It was one of those games brought up when the, "Are games an artform?" question was asked and it was a great example to use as an argument towards the affirmative. Who knows... maybe they'll do a decent job at this but I still feel it's just not needed. I would much rather a ground-up remake of the game itself to happen during the 10th generation or so than this (as long as the voice acting remains untouched).
Some things should be left alone as the medium they were made for, in my opinion.