Basically will they just take our existing palace of the dead and Heaven on High and make a separate blue mage only co-op or solo deep dungeon. Where you will be locked to the set of spells you take for that 10 levels and the monsters have type weaknesses like they do in the masked carnival.
Its just one of the modes I've really been hoping to see for Blue. I do think the titles gained from Potd and H0H shouldn't be obtainable in this blue mode so as to not take away from the time people put into doing that content solo, but I like deep dungeons and Blue Mage and really want to have more long term co-op and solo content to do with them.