Revisited this for their first season. First and last I think. 

The main attraction of playable Joker is locked behind grinding, and the content just isn't varied or interesting enough to unlock him; nevermind continue playing with him. 

I could maybe have forgiven the bland content if there was some kind of mini campaign story to spice it up, but there's none of that. 

Unless they improve these seasons, I can't see this surviving. Oh well! I still had a decent time with the OG game.