I was playing the city watch on a normal diffucculy and I got to the final area I had to face a orange 5 star Moana on a normal difficulty and was destroyed so if this is not broken then I don’t know what is
It’s based on team power, and pulled from actual teams. Somebody placed a Moana in arena. Her power is nominally appropriate to yours, so the algorithm picked that “team.”
It’s frustrating, but not broken.
Most likely, somebody placed a powerful Moana in a relatively weaker tier to bait lower-level players into attacking and feeding arena currency.
I recommend taking off all your disks from your toons before you refresh city watch. This takes off some power and lowers the craziness of city watch.