Random thing I came across, but turns out you can have an AI version of your character play through anything in multi-verse, which means if you need to play through something with a character you don't like, you can create an AI Loadout, put all the points into combo and counter, and they'll auto-play and almost always win. You'll earn the XP you need and if doing a challenge with mother boxes, you are getting mother boxes for free.
Also, if you have an arcade stick or fight pad, you can turn on turbo for X, and your AI character will progress with no input from you, since you have to hit X to progress after each fight. This is great for this Wonder Woman event. I got her up to 12 normally, but I really don't care for playing her, but she gets gear from the upcoming movie and I do want that stuff, along with getting her up to level 20.
This is gonna be amazing for leveling up like Black Canary and some others I don't have any interest in playing lol