A victory by the team seems 'within the realm of possibility'. [=a victory seems possible]
It's not 'beyond the realm of possibility' [=it's not impossible] that he will return.
new discoveries in the 'realm' of medicine
(..) they never mention the shoveling. Or the shit. They tell you about honor, pardoning crimes, and protecting the realm, but shoveling really is most of it. And getting attacked or killed or worse. And that. But when you're not (..)2013 TvShow: Game of Thrones Title: And Now His Watch Is Ended Season: 3 Episode 4