this AU means Alternate Universe. Where Godzilla got raised by his overprotective Girls from Beacon Academy: Team RWBY and JN(P)R including Rose/Xiao Long/Branwen Family when he was an infant before he became a king and also there will be some cross...
Godzilla is swimming towards the remaining of Atlas who is the Apex Cybernetics as Rodan following him.
Rodan: Godzilla can we talk this out? Godzilla: No. Rodan: Cmon, Godzilla, Maybe we can work something out or anywhere.
Godzilla swam faster as Rodan catches up with him and blocks his path.
Rodan: You've had an unfathomable loss. You need time to process it!
Godzilla got irritated and impatient so he attacked him with his Close combat before firing his atomic breath pushing him into the water. Godzilla glared at him.
Godzilla: I'm bringing them to justice. Rodan: Godzilla, Don't do something that you will regret. Godzilla: I already have.
And with that, Godzilla swam away.
(Start the Music)
In Atlas, they have Apex Cybernetics Facility in the Mantle.
Operator: Sir, I detected from the Radar. Ironwood: What is it? Grimm? Operator: I don't think so, It looks bigger.
Then out of the water, Godzilla appeared
Ironwood: It's Godzilla!
Godzilla roared in anger as he destroyed the facility with his own way. He whacked the building with his tail. Soldiers were getting injured and then He finally finished them off with his atomic breath and destroyed their supplies and projects, seemingly killing entire staff and soldiers.
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Then Godzilla roared in triumph as Ironwood and the Remaining staffs witnessed his rampage. Godzilla glared at them one last time before he went back to the sea to Inazuma.
Godzilla (thoughts): That should teach them.
Unbeknownst to Godzilla, Arbiter, Purifier, and Observer Alpha witnessed that Godzilla went on the Rampage as they felt remorse for what they did to him.
Arbiter: Godzilla? Purifier: What have we done. Observer Alpha: We're so sorry Goji.