Basically, the idea is that you would get expedition tickets that let you go through specific areas on the surface world to try to bag new bosses. These new bosses could drop materials to craft new items. The shadow lair already worked pretty well for 000. Instead of running through a tier 3 boss strata, you could hunt specific tier monsters with your buddies, and these new boss fights would basically be epic battles that, instead of running through a level, you would basically fight and chase these enemies through a number of areas. Basically Monster Hunter but with Spiral Knights battle system. I think it would work pretty well.

We hear about supposed "Dragons" and yet we have yet to see an ACTUAL dragon. Would be interesting to see the ecosystem of a volcanic region... vog cubs that feed off salamanders that in turn feed off oilers that spawn in various fire pits, with the dragon at the top of the food chain consuming the vog cubs.

Another possible expedition would be to try to hunt down a "Skolver", a beast that goes into long periods of hibernation until it senses the living... it strikes so quickly that its prey don't even realize they have crossed over, wandering the wastes aimlessly in undeath. Frozen Shamblers and Chilling Howlitzers would make up most of the enemy composition, perhaps along with some Alpha Frostifurs. The blizzard is so intense that at times the winds that blow by can suddenly freeze adventuers in their tracks, leaving them prime targets for the Skolver.

There are plenty of possibilities. It would be a chance to bring out theme/monster combinations that are relatively unused as well as facing all new boss enemies. If done correctly, it, like shadow lairs, would incentivize players to try out new armor and weapon combinations which makes more money for 000 on top of the money spent acquiring tickets and on crafting the new gear rewards.