Future Imperfect, based on Peter David’s 1992-1993 Hulk limited series, is the new one, and the third “Summer 2015” featuring the Hulk prominently. This particular event makes it even easier to tie this all to Secret Wars, as it is all about a possible future, time-travel leading to an alternate reality - the stuff the mega-event is apparently made of.
Future Imperfect starred the Maestro, a villainous alternate future version of the Hulk that debuted in David’s The Incredible Hulk #401 in 1991. The stronger, and slightly crazier version quickly became a fan favorite, making fresh appearances every few years as a repeat antagonist to Hulk and others.
Previous 'Summer 2015' teasers have included call backs to Civil War, Age of Ultron vs. Marvel Zombies, X-Men: Years of Future Past, Planet Hulk, Armor Wars, House of M, Infinity Gauntlet and Old Man Logan, Age of Apocalypse and the new stories Inhumans: Attilan Rising and the End of the Ultimate Universe .