Looking for Injustice tips.

I just ordered Injustice online and am looking for some tips or other useful information on the game. One of the big things is which DLC characters are worth buying and which I can just pass on. I am not that interested in the characters, but moreso in the gameplay and mechanics of the characters.

Secondly, this is my first MK style fighter. I have never played a MK game outside of a couple of games at partys and am really looking forward to exploring the mechanics of this game. If anyone has tips or anything of the sort, feel free to post them on this thread. Thanks for reading.

Make use of the tag feature in the combo list menu by pressing Y or (Triangle), this will make learning combos easier and faster for you. As for actually fighting just be sure to alternate between combos and a special move cancel, get some practice down and figure out which combos and special moves you can cancel into, its surprisngly easy once you get the timing down.