You really have to give it to Ronimo. They released their 2D action platformer MOBA Awesomenauts back in 2012, and as a smaller developer, they've gone through so much. They've dealt with legal issues surrounding the publishing of the game on previous generation consoles, and even created other projects while maintaining monthly support for Awesomenauts, as well as an expansion and a heap of free characters. You could say they have their hands full.
And the ride isn't over yet. They've just announced their newest update, which is yet another expansion titled Overdrive -- set for release sometime next year. Among other base enhancements to the game like a new matchmaking system, the recent shared XP update (which brings it more inline with Heroes of the Storm and less like DOTA or League), and visual reworks for classic characters, there's also a ton of new content coming.
Four characters are already confirmed (Professor Yoolip, Chucho Krokk, Jimmy and Amy, and Ix the Interloper), as well as that Starstorm stage that still hasn't been released yet. Three of the characters will be part of the premium package, but Ix will be free for everyone.