#2. An NJPW run

The Revival would fit in perfectly with New Japan Pro Wrestling. Given that the company focuses heavily on the in-ring content, there's no doubt that they could have great matches. NJPW has a history of great tag team wrestling and if The Revival wants to have the best matches possible - then Japan is where they need to go.
It doesn't even need to be a long run with the company, but if NJPW offers a great contract with a satisfying schedule, we don't see any reason why The Revival shouldn't take it. Many people think that AEW is the best destination for The Revival post-WWE, but despite the seemingly inevitable jump to Cody Rhodes' promotion, NJPW could be the best place for The Revival to jump ship too after a while.
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It would be exciting to see them wrestle some of Japan's top teams and it would also serve as a great part in growing their careers. We could see a whole different side to them that we've never seen before.