I think some things perhaps like cracking a password protected spreadsheet or zip to retrieve data within might be interesting.
Also, perhaps some updated web bits, dealing with HTML5, Canvas, NodeJS - I've been trying to think of some specific things, potentially just some skiddie stuff like, erase someone's high score in some silly game, or bust through a poorly designed paywall to get the content of some article you really wanted to read.
It would be interesting to see if we could update some of the "SQL Injection" attacks for new DB structures like MongoDB and NoSQL, see http://security.stackexchange.com/questions/23734/what-type-of-attacks-can-be-used-vs-mongodb
I've been dealing a lot with virtualization lately, perhaps a mission that requires the requires mounting of a virtual hard disk in virtualbox, could potentially be loaded with a dozen missions of varying degrees. I haven't looked at the forensics missions yet I'm afraid, but this would be a fun way to frame some.. "this VHD is a snapsot of a so and so's operating system, we believe he's cheating on his really hot and sweet wife with a crack whore, find some evidence".