http://www.pcgamer.com/marvel-heroes-is-closing-down/

The free-to-play Diablo-like MMO Marvel Heroes got its "biggest update ever" in January, with an overhaul of all 59 heroes, a new difficulty slider and endgame progression system, and various other tweaks. Following that, in June of this year, a console version was released under the title Marvel Heroes Omega. Sadly for players, it didn't add up to much in the long run, as Marvel has confirmed in an email to Kotaku that the game is being shuttered. 

"We regret to inform our Marvel Heroes fans that we have ended our relationship with Gazillion Entertainment, and that the Marvel Heroes games will be shut down," a rep said. "We would like to sincerely thank the players who joined the Marvel Heroes community, and will provide any further updates as they become available."