The battle of towers rages on
No matter how crowded a genre gets, there's always room for a game to set up camp and do something original. Case in point, the upcoming Tower Wars from SuperVillain Studios. Despite its emphasis on tower defense mechanics, it's looking to spice things up with elements of RTS and absurd online multiplayer.
Players will be put in charge of constructing and upgrading unique towers, as well as fending off enemy waves by creating difficult and lengthy mazes. I can't speak from experience or anything, but I have to imagine that a difficult maze could do a lot to diminish the morale of your opponents. And having towers and units more powerful than theirs probably helps, too.
Battles break down into 1v1, 2v2, and 3v3 scenarios. You'll have the choice to play ranked or unranked matches, though I suggest sticking with ranked because you only live once. You'll also be competing for a spot on the game's leaderboards, and judging by the amount of buzz already surrounding the game, I imagine making it to the top won't be an easy task.
A release date hasn't been announced just yet, but SuperVillain has mentioned that the game should be hitting Steam sometime soon. There were a few beta events in the past, but it doesn't look like there will be any more leading up to the game's release. Don't worry, I feel your pain.