Is the Uncanny x-men compatible with the new Avengers vs. x-men set? What boosters go with which? I'm guessing, seeing the prices, that the uncanny x-men came out a while ago and the avengers vs. x-men is a new release, probably with a few rule tweaks. So, if you were looking for a Christmas introduction to the system for two kids at $30 each, what would you buy?