Even after beating the game in one sitting Saturday night, I went to Best Buy today to buy the game for myself on Sunday. I'm the first to admit that I'm not the best at fighting games by any means, but Injustice does a fantastic job of introducing unfamiliar fighters to the genre while still layering in the mechanics that would make any enthusiast grin. Picking from a handful of the biggest DC heroes and villains certainly adds a layer of appeal to me as well.
I've only spent about 2 or so hours practicing my skills outside of the singleplayer campaign. If you'd like to clash in a few practice rounds against me, feel free to send me an invite on Xbox Live.