In one of the "intermissions" in the #Overlord light novel, there is a hint that there might have been another player who was transported in the past. However, they are described as being impossible to revive because they don't want to be. #anime
The intermissions are a slow drip. Each book only has a short one and it can be years before a new book comes out.
It gets the point across though.
Anytime there is a "sign" (which predictably adds to Ainz's paranoia) that there might be someone powerful or a powerful force out there, the intermission puts that idea to rest.
For instance, there might be a relic from ancient times which appears, then Ainz might take a defensive posture. But, practically speaking, the relic might be limited in it's utility.
overlord spoiler
The intermissions are a slow drip. Each book only has a short one and it can be years before a new book comes out.
It gets the point across though.
Anytime there is a "sign" (which predictably adds to Ainz's paranoia) that there might be someone powerful or a powerful force out there, the intermission puts that idea to rest.