Marvel Heroes was released in 2013 and has changed a lot to reach the state that it is in now with Marvel Heroes 2015. Give it a shot if you like action RPGs.
About this game: Marvel Heroes is a free-to-play massively multiplayer online action role-playing video game developed by Gazillion Entertainment and Secret Identity Studios. Characters such as Iron Man, Captain America, Deadpool and Wolverine serve as characters that players can unlock in the game. Players who pre-purchased a game pack received early access to the game on May 29, 2013. The game was then officially launched on June 4, 2013, on Microsoft Windows. An OS X version is planned to follow post-launch, and is now in open beta.
The game was renamed to Marvel Heroes 2015 on June 4, 2014. The lead writer of the game is Brian Michael Bendis, who has written a number of major Marvel Comics. The plot revolves around villains, with the main antagonist as Doctor Doom, and heroes in various conflicts.