Doomsday trailer has leaked online ahead of schedule and features an unexpected superhero collaboration that's worth looking forward to.

Sir Patrick Stewart’s Professor X and Ian McKellen's Magneto also appear in the preview for Marvel Universe’s latest crossover movie set to hit theaters later this year.

Patrick Stewart, Ian McKellen and James Marsden reprise their X-Men roles in the latest teaser for 'Avengers: Doomsday,' which Marvel Studios rolled out on Jan. 6. Previous mini-teasers released for the movie showcased Chris Evans' return to portraying Steve Rogers and Chris Hemsworth in his role as Thor.

Gwyneth Paltrow, who recently made her grant return to film acting in "Marty Supreme," shared that TV acting was a wakeup call to just how much time can be wasted on set. Shading the Marvel projects she's done, the actress joked, "I'm gonna die in my trailer!" while interviewing on Amy Poehler's "Good Hang" podcast Tuesday.

A complete guide to all the upcoming Marvel movies and new TV shows scheduled to release over the next few years