Rockets could add picks. Frees up cap space, frees up playing time, increase our rebounding and defensive efficiency. Young player with a good potential, hustle, good defender and runs the floor well.
Houston would do this because they clearly don't have a legit PF. Asik can take a lot of rebounds and defend so having Bargnani would help them on the offensive end of the floor. Lin, Harden and Bargnani is a pretty good young stars trio.
So yeah, Andrea Bargnani for Cole Aldrich+draft picks.