>>3851886
He hasn't come back as just Sepulchre or Valen iirc. He has sort of popped back in a few times like when he possessed Akriloth, but it is hard to know what's even canon and what plots have simply been dropped or forgotten about. I'm not even sure Throne of Darkness is canon, unless it's been mentioned specifically or used in the main storyline I'd just err on the side of caution about side stories honestly. For example they dropped the Titans of Battleon plotline in DF when they reached Book3 because they couldn't figure out how to integrate it (a cop-out answer if you ask me), and there's what they did to QoM with rewrites both during the Malgor Arc and recently too. I love these games, but they're so painful. I'll never get to know where they were going with Warpforce or Herosmash, man.
Sidenote; in searching for confirmation of whether it has been confirmed canon or not since last I checked I found people discussing whether Vegeta + Goku could beat the lore accurate 13th Lords of Chaos + Drakath (I don't really see how they could unless we put restrictions on AQW like only using Chaos Saga for the 13th Lord and Drakath) and an in-depth discussion of whether Safiria can get pregnant with a natural born Werepyre.