When Worlds Collide

After two years on Earth-199999, Barry has adjusted to his new "life" as a darker and grittier Flash, having to leave his team for the better. However, after a series of certain events propel him to do so, Barry finds himself at the center of a series of wars and battles with S.H.I.E.L.D., the Avengers, and many other allies and enemies, both old and new.