Cope Island

Cope Island is where Off-Season 2 takes place.

Cope Island seems to be a smoll, barely populated island between continents which seems to be closer to the US. The island is designated as part of the Tomodachi Nation, once a small sea country that was buried in a tsunami, only the remote viallage on top of the mountains remained and was abandoned.

Off-Season 2
This was the place wrestlers took as home during Off-Season 2 and renamed "Cope Island".

As more people came to the island, the village flourished into a small city, with shops and stuff.

However, during the end of Off-Season 2, in the "Cope Island Shooting" perpetrated by OP, where he was the only one left, it was revealed that this island wasn't actually a real place, but somewhere that existed out of reality, as people who didn't live in it could neither see nor touch anything related to the island, and further more, it was using OP as some kind of "host" which didn't allow it to kill himself, having to continue living there all alone, forever.

Season 3
On this divergent timeline, Armstrong sacrificed himself to save the mental health of OP, and life on Cope ISland progressed and continued, probably infinitely until the end of time.