Earth-239, also known as Marvel Comics 3, depicts a universe where mutants and the X gene is a dominant factor to most of this reality's events, with mutants and the X-Men having a major impact on this Earth and it's characters.

This universe also spans over several decades including the future of 2099, and adventures of Mayday Parker, Spider-Girl in the 2040s.

An alternative future has Ultron take control of Master Mold's Sentinels, and destroys most of the human and mutant population. This is the future that Bishop and Cable originate from, and one that both men have been trying to prevent.

The timeline.

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