Turbine announced, via the Infinite Crisis website, that their superhero themed MOBA will be shutting down on August 14.

The game has been in beta since 2013 but it never really picked up enough steam or interest to continue the title.
After much deliberation, we regret to announce the official shutdown of Infinite Crisis. We will end development efforts today and will close the service on August 14, 2015.

Between now and August 14th, the game will remain available to play completely free.

The studio suggests that those who purchased the Starter Pack or the Elite Pack on Steam should request a refund.