I feel you on that feeling. I'm getting tired of Vegas.
But i have the opposite problem, I've been trying to keep busy but can't lol. I live on my own now and my managers keep cutting my hours. So I'm trying to get a job as a stagehand, setting up concerts.
But Injustice is an awesome game. It's really zone heavy though, so if it frustrates you in MK9, you'll kill yourself when you play Injustice. But a lot of the female characters are high tier. Wonder Woman is really good, Batgirl is broken good, Raven is decent, Killer Frost is pretty good, CatWoman is alright. There's a demo in the PSN Store if you want to try it out first, Wonder Woman is one of the characters you can play as in it. I personally love the game, but a lot of die hard MK fans don't like it.