Though that stupid death they gave to Barry gave me an idea for what has to be the best possible ending for the Injusticeverse.
Behold its lord and savior...
Eobard Mother****ing Thawne.
Joker: "Damn. I actually wasn't sure old lightning bolt ears would be enough to fall for that gag. Ah well, bonus points! Now then, on to-
Ominous vibrating noises intensify
Eobard: "Tut tut tut. Oooooh. You should not have done that."
Harley: "Who'da hell are you spose'd ta-"
Eobard: "Yeah, sorry. I don't speak dumb *****."
*
Before she even has time to blink, Harley's skull explodes from the hypersonic fist impacting against her face"
Joker: "Oh come on! I was in the middle of something marvelous. Nuclear genocide and all that. Surely a man like you could appreciate that, BackFlash?"
Eobard: "See, I actually was content to just let things play out. You making your mark in history as Edgy McEdgington, the edgiest clown that ever edged. But then you had to go and kill Barry. My Barry. And that just will not do at all."
Joker: "So what, you're gonna smear me across the pavement are you?"
Eobard: "Oh no. I'm not here to kill you. I just came here as a courtesy. To tell you what I have planned for you. In your past that is."
Joker: "My past?"
Eobard: "History is not going to remember the Joker, Batman's greatest arch-nemesis. In fact history probably won't remember you at all. If it does, you'll be little more than a footnote. An even lamer Batman baddie than Maxie Zeus."
Joker: "Y-You can't do that."
Eobard: "I most certainly can, I assure you of that."