Oh Boi, he is in trouble now

With prep time.

Prep time won't do Shit. He is above and beyond God's with that gauntlet in his hand.

Also he has all the Lantern Rings. Though He has been a Black Lantern, a Yellow Lantern, etc. But is not possible for him to wear all the rings at the same time. The power is unmeasureable. It is beyond space and time.
But if he somehow does that,then Nothing can stop him.

Plus, he's literally a god in the latest comics

I wasn't aware of that.

Yeah, he sat on Mobius chair and gained all the knowledge in the universe and became the god of knowledge.
He didn't stay for long tho but still gained some heavy stuff from it

Ohh. That I am aware about. The Mobius Chair also revealed that there are 3 Jokers.
And then there was a theory that, Alfred is one of the Jokers and he is out there to make Bruce better.

It's not a theory. In one of the version of the comic, Alfred was indeed the Joker.
Personally I believe the other two Joker are from other dimensions

Ohh. Well if we see from that point of view than there must be more than 3 Jokers as we have the Multiverse thing going on. . There has to be one Joker for every dimension. But then, it would ultimately pin down to existence of Only one Joker. I think the other two Jokers are a mystery which is really interesting.