If you subscribe to the SK newsletter it said:
Coming Soon...
Want to know what else is coming to Spiral Knights? Well, among other projects, there is a fourth Danger Mission underway...
We'll be posting more about this fourth Danger Mission and other releases on the Spiral Knights forums, Twitter, and Facebook page, so keep an eye out!
So what do you guys think the next one will have in terms of monsters and status(es)?
Just because we've already had three of the other types of bad guys, so it would either be beasts or jellies, and I am thinking since we got the new hunter stuff, it's gonna be beasts. (Just an observation, not saying it WILL be this)