In the shared universe of Ultimate Marvel, the X-Men have more than once crossed the paths of other superheroes: Peter Parker is a good friend of the X-Men and is Shadowcat's ex-boyfriend. The X-Men share a wary truce with Nick Fury and The Ultimates, who have been both their best benefactors ("New Mutants" arc) and as adversaries ("Ultimate War") in the past. The Ultimate Fantastic Four have met the X-Men in "Ultimate X4" and the teams are generally on positive terms.