I think he only wrestled Bryan Danielson back in the old ROH days. CM Punk had left by then I think from my dodgy memory.
Saw a comment on Reddit that makes sense and that is for Danielson to go over Jay White then go on a tour in Japan facing both Juniors and Heavyweights defending the NEVER Open weight belt. So many quality matches to tick off.
Hiromu, Ishii, ZSJ, Naito, Cobb, Ibushi, KENTA, Desporado off the top of my head.
Apparently he has already wrestled Shingo in Dragons Gate.