Honestly, I don't understand why DC hasn't done this TPB already. When they licensed the Milestone characters to use in the DCU, I thought for sure that a Worlds Collide TPB would be the first thing they'd release as an introduction to the characters. Maybe they decided against it, because they were treating it like the two universes had never met before. Still, they've done some Milestone trades since they got the license - still looks like they'd have collected Worlds Collide by now. If they ever do, I think Icon #16 should be the cover of the TPB - the pic of Superman facing off with Icon.
Would you buy it? Let me know in the comments, and thanks for reading.