Grand Theft Auto Online will eventually include a content creator. And new leaked videos show off how it may look.
"Funmw2" discovered the content creator tool, but notes that the version showcased in the video is "old." This version allows users to create races and deathmatches, but not missions. Obviously, the tool is a work-in-progress, and will likely change by the time Rockstar is ready to release it in the wild.
As Gamespot points out, one of the leaked videos show off the ability to determine weapon locations and player spawn points. Users can also toggle the time of day, player caps, and traffic volume. Here's the first of the videos, while the rest can be seen on YouTube: