More and more Multiplayer Online Battle Arena (MOBA) games are becoming available to tablet users. Most recent addition will be Fates Forever by Hammers and Chisel, company dedicated to tablet software development. Not much is known, except the word that it will deliver full MOBA experience similar to League of Legends but while you are waiting for Solstice Area and Arena of Heroes, you can check out the trailer:
Exact release date for Android version is not known at the moment but is expected after iPad release, so probably around Q1 2014. You can sign-up for the newsletter which will keep you updated on the latest info for Fates Forever.