I'm really hoping for a Meteora box set because I think it's our best bet to get some of the b-sides from that era that never saw the light of day. Getting some of those unreleased remixes would be cool too. At any rate I don't expect a box set to be as expansive as the Hybrid Theory one just because HT was a much bigger album. I could definitely see them doing a 5-CD set with Meteora, Collision Course, Meteora-Era LPU Tracks, Meteora Single B-Sides and an unreleased tracks CD like the HT box set had. If they do want to do something as big as Hybrid Theory 20 they could add in some DVD's with the behind the scenes documentary and a live show or two and some vinyl pressings of Meteora and Collision Course.