End User Mission Editor In The Future?

Just finished the main storyline and I had a ton of fun…

Curious if there has been any talk about the future possibility of an end user mission editor? It appears that the game is made of separate modules (Environment, combat, scripted events) and if my assumption is correct, would a mission editor with a GUI be possible? If so, users could create small events, or chained events using the current game mechanics and share the files via steam or the console network services.

Discussion on the topic?

Adding mission editor does sound amazing but since there are cinematics and story many other tools are also required for this to become more fun.Noone would like fetch or simple kill quests.