Carabas

3rd person following 3 people traveling through time, one woman and two men. One of the men, Billy, winds up being left behind, the other two have to abandon him in a place where he's "condemned by the powers to a life of battles." But they've just now encountered him again, as the 9th "killer" they have to face in a place of challenges, carrying a sword. A great deal of time has passed from his perspective and he's almost unrecognizable, cold and intimidating.

They've returned to their own time, in the hotel rooms they were in before all the time travel started. Due to timeline shenanigans, the woman runs into a 'past' version of Billy in the hall, a version who hasn't done any time traveling at all yet, smiling as usual.

The 'killer' version of Billy is talking about the souls left "there," abandoned by her. The other man who'd traveled with them questions that phrasing, 'souls' - "Are there really any souls in hell now?" Due to timeline shenanigans, is the implication - before Billy'd been abandoned, the two of them had a longstanding debate on what happens to the people in erased timelines, whether they still exist in any form. Billy's smiling, which is not a good thing, and saying they can finally conclude that debate.