History
In an alternate future, a time-traveling villain known as Chronok was killing off most of the greatest heroes, leaving only a handful left, one of them being X-23. Terror, Dagger, Araña, Darkhawk, Gravity, Mutant 2099, Sleepwalker, Speedball, and X-23 banded together and formed The League of Losers. The league (except for Araña who died in an earlier confrontation with Chronok) went to the future to prevent the villain Chronok from stealing Reed Richards' time machine; Chronok came to the present after already having killed all of the major heroes.
Chronok was from the same time period as Mutant 2099; the group stayed with him and his mentor Reed Richards to wait for Chronok, and during this time X-23 sparked a relationship with Gravity. They defeated Chronok, but they couldn't go back to their present, due to time travel and alternate timelines. The group decided to stay in the future, satisfied with the impact they made, however unnoticed. Mutant 2099 suggested reforming an Avengers or the "Fantastic Nine".[citation needed]