Thanos
the hammer belongs to THOR it was a teaser for the upcomming AVENGERS movie.
Loki
So far, the enemy is Ultron, a sentient robot. Maybe Thanos, an extremely powerful villain since he appeared in the credits at the end of The Avengers.
Ultron
Doomsday is a DC villain not a Marvel character.
Doomsday is a DC villain not a Marvel character.
the biggest one that is probable is thanos.
The frost giant! Can't wait
Thanos is at the end of Avengers Assemble.
Thanos played by Josh Brolin.
That isn't a brain teaser