Avengers: Doomsday’s first trailer puts everyone on high alert

After months of teasing us with reminders about how large Avengers: Doomsday's cast is going to be, Marvel has finally released a proper trailer for the film. Though Robert. Downey Jr.'s Doctor Doom definitely appears to be causing a lot of the chaos in Doomsday's first trailer, the movie seems like it's going to feature more than a few moments where different teams of heroes fight one another. Thor (Chris Hemsworth) seems to be the only person who understands that the X-Men, the Fantastic…