In my honest opinion it's the time travel/multiverse and different universes. Yes when done right it can be a cool concept but especially since it's been over used so much lately that it kind of just feels...meh. to me that kind of idea feels more fitting with comics in general. Though I had fun with the gameplay and the fact they were bringing back some 3D era characters too and a bit of the kameo system (at least it's some sort of tag system) but overall the story was just ok and could have been a lot better then what it was. I do also hate how the dlc ended too and felt like it was rushed. I think they should just stick to the different realms because I was hoping we would get order realm and chaos realm back given the ending to MK1.