Kabam, the makers of games like Castle Age and Underworld Empire, just announced they are developing a mobile super hero RPG game set in the Marvel comics universe. They didn't share any further details, other than they plan to release it in the fall of 2015 for Android and other mobile platforms.
The company is no stranger to the Marvel property. They are getting ready to release a fighting game to mobile, called Marvel: Contest of Champions. Here's the press release link below,
Source: Kabam and Marvel Team Up for a Second Super-Powered Mobile Game | Business Wire