This issue collects both Ultimate Fantastic Four Vol 1 issue 22 & Ultimate X-Men Vol 1 issue 22
Ultimate Fantastic Four: Crossover - Part 2 of 3
Ultimate X-Men: Hellfire and Brimstone - Part 2 of 5
This issue also offers a free poster inside bound at the center of the issue
In ultimate FF, the crew crossover into the Zombie Marvel World