Board Thread:General MK Discussion/@comment-4222221-20150116005423/@comment-5746209-20150116010118

Since all the character shown for these boots are returning characters, maybe the last two are as well. The first one could be Reiko, he's been shown wearing some cloaks and has similar boots, being a war general. The second one could be Ermac's or Reptile, since you mentioned it looked like a ninja. Out of all remaining ninja characters, Ermac and Reptile are the highest likely to return and be involved in this game.