Even as someone who likes most of Bethesda's stuff... I don't see it working very well. I'd just hate to see a Star Wars game be brought down for running on Gamebryo, I mean """Creation""" just because Bethesda is too cool for a new engine. (And before anyone says it, I know making an engine is a very expensive endeavor and Bethesda's games are expensive enough without them making an engine for every new release, but that doesn't justify them renaming the same outdated piece of crap for almost a freaking decade.)
