Given that in their extended roadmap section they mentioned new dungeons being added later on in the cycle, it doesn't seem to me like it is going to be a chain of connected dungeons but instead one off dungeons that are custom tuned to "Criterion" standards. I'm also wondering if they will be completely new dungeons or essentially old Hard Mode dungeons just given a new name, with the old already existing layouts and what have you being repurposed and reused in new/different ways.

As someone who likes to do the odd solo challenge, I'm very interested in hearing more especially since they say the Criterions are supposed to be actually intended for solo play as opposed to the clunky, unbalanced "solo" experience in Deep Dungeons.