What happened with Copeland might happen with Owens, although I think Owens will take more time off for his family. AEW isn't going anywhere so why rush. Copeland clearly wanted to continue immediately, it was WWE who didn't have anything for him and didn't see the value in an aging Edge. I can't blame them there. His return seemed mostly stale and he doesn't add viewers.
Having said that, Owens is a Triple H guy through and through, is getting older (he recently dyed his beard however), and as a slightly heavier fella who's very athletic, he might not wanna go back to that carefree indy style every week. AEW always has injuries. KO hasn't had a slew of injuries in his WWE career because of that safer style.