I don't think the rest of the store has updated yet, but it seems Paragon is already available to download. For those who don't know, it's a free-to-play MOBA that will officially be launching in August. PS Plus members get an early preview, as well as some bonuses.
The game is developed by Epic Games, known for Unreal Tournament and Gears of War, so it should be pretty good shooter on top of it being a MOBA.
Once you've played it, feel free to return to this thread and share your opinions. I'll be doing the same.