It goes a little like this:
1) Long period of Zuma being irrelevant, no one paying them any attention, they do nothing, etc.
2) Someone once again remembers they exist.
3) Someone tries to "figure them out."
4) Zuma get pissed and/or manipulated into attacking/threatening to attack someone.
5) Crisis of Zuma apocalypse narrowly avoided due to new deal with Zuma, begging, and/or pleading.
Rinse and repeat.