Thought I'd post this incase anyone didn't know about it, and there is a few Marvel fans on here
Free to play on Android and I assume IOS
https://play.google.com/store/apps/details?id=com.d3p.mpq&hl=en
I've played it for a few hours and haven't had to spend a penny, it's great
http://uk.ign.com/articles/2013/10/11/marvel-puzzle-quest-dark-reign-review
Assemble a team of Marvel’s biggest super heroes and villains and battle with Puzzle Quest’s trademark match-3 and story-telling gameplay in a game that combines favorite Marvel characters with a deep RPG leveling, player vs. player, character upgrades, and more.
Free to play on Android and I assume IOS
https://play.google.com/store/apps/details?id=com.d3p.mpq&hl=en
I've played it for a few hours and haven't had to spend a penny, it's great
http://uk.ign.com/articles/2013/10/11/marvel-puzzle-quest-dark-reign-review