So far, in comrades, they travel to the Hill overlooking insomnia via Cindy's truck (Don't think it's her driving). Guy is currently fighting a king behemoth. Not sure what else will be after this. Hopefully more!
Edit: So far it's only that one quest but I think you unlock more?
It is but it looks like there may be more quests beyond that one? If they incorporated it there and let you actually travel to insomnia, that would be awesome. We won't know until people play more though.
So far the updates are awesome.
You expand to Caem, then Leide/Hammerhead, then Insomnia (from the datamine I can tell you that). ALSO, it seems you get these "Future" quests that add to the bros travel to Insomnia?