I do agree that it'd be nice to have a bookends-like module which is like the tutorial but harder. The Yellow Dragon is sort of like that, but it's not the expected rematch with Greenfang and chance to finally actually get that Golden Blade item. Currently the only way to fight it is in custom modules or the top of the Cavern of Chaos. Speaking of, does TKoU intend to also keep developing the CoC as the game gets new adjustments? New Quick Draw content? There's so many different routes to develop CH in, I'm really curious to hear what they think the best part of CH is. Personally I find myself agreeing a lot with Vacuity's post, I liked the low-level AotA and the whole of EttSC modules more than the high-level AotA, CM and AI modules in terms of single-player PvE content.