What if we return only the Oni side of the FSM?

At the very least, he will become a universal threat. I think even SD's will be in danger (but that doesn't mean it's the end for them all, just that there is a threat). In this form, his Golden Power will mostly turn into Destruction, but it will be dozens of times stronger than the powers of Omega and/or Garmadon. Even Overlord will not be a worthy opponent for him. Golden Lloyd could be a contender, but Oni FSM will still win because his Golden Power is more powerful due to his anger and...