Okay, um, let's see...

Most of the characters are vacationing on Museum Island. Some, members of the multiversal police force Zyguard, and the villainous force the Dai-Black Cross Army, have appeared in the island. Zyguard to take down a dangerous group of mercenaries and Dai-Black Cross to... I'm not entirely sure yet, eh-heh.

That's pretty much what's happened so far so, um, yeah.