The free Brink DLC coming out in early July is going to coincide with a patch that aims to fix many of the issues people have had with the game, in particular the awful AI. Though without a review of the DLC and fixes being out yet, you'd be taking a chance on whether the fix actually fixes it properly. Personally, I LOVED Brink, except for the Ai and lag issues...if they can manage to fix those, this would be a seriously fantastic game.
Alice: Madness Returns is alright...the art direction is wonderful, and the level design at times feels like a nice throwback to Super Mario 64 style gameplay, but it can also get kind of repetitive.