Valve has divulged what's next for Portal 2, following the recent release of the "Peer Review" add-on: "an easy-to-use" map editor that's expected to come out in early 2012.
This editor will hopefully push crowdsourcing a step forward, since it's said to let players "view, play, and vote" on community-created single-player and co-op test chambers "with a simple click."
There was no mention of applicable platforms, though I suspect Valve is still trying to figure out if this stuff is feasible on consoles. That'd be swell.
Here's a half hour of the Arkham Origins Mr. Freeze DLC, if you want to watch that
11:45 AM on 04.15.2014