'Avengers: Doomsday': Russo Brothers confirm Captain America, Thor, X-Men, Black Panther clips are NOT trailers but CLUES

Just when you thought Marvel fans could not get any more creative with the theories, director duo Joe and Anthony Russo have only amped up the curiosity by declaring 'Doomsday Has Begun'. The directors sent fans into a frenzy on Tuesday night when they dropped the fourth clip, previously reported to be a trailer of their upcoming blockbuster 'Avengers: Doomsday'. Coming in a week after it clip was first leaked online, the video featured Suri stepping up as the new Black Panther and meeting Ben from the Fantastic Four amid a rustic setting, believed to be Namor's underwater kingdom, now on land. The clip ended with a template similar to the other trailers. Watch: 'Avengers: Doomsday' clip 4Russo Brothers' note to fansHowever, fans were sent scrambling back to rewatch the other clips after the directors confirmed that the character-focused clips were not trailers or teasers, but rather “clues”. In a cryptic Instagram post, they wrote, "What you’ve been watching for the last four weeks… are not teasers. Or trailers. They are stories. They are clues… Pay attention #DoomsdayHasBegun."Following the big revelation, fans took another look at the four promotional videos that have turned the spotlight on the four major characters of the Marvel Cinematic Universe - Captain America, Thor, X-Men and Black Panther. Fans have already begun sharing their thoughts and theories about what these clips could mean. While almost all have turned to the time cues in at the end of the trailer as possible connections to the film's plot and story, others believe it is time-stamps to older Marvel films, possibly connecting it to the role of the sacred timeline.