I'm not too concerned about the underwater level since all known info and the trailer only shows it as a portion of a level in a DLC pack that includes multiple levels, so it's probably not going to be that much. The thing that I'm concerned about the most is if the story works out well and if it provides enough strong content to be worth the $10 purchase. It's also known that it will add new content to the ending, but there's a damn good chance that it's not going to be much. I'll make a video review of everything that's included in the DLC (might take a few days to a week to make), and if by some very rare miracle it includes something huge in the ending (not likely), I'll make a separate video on that.