Reported on website msxbox-world.com, the rumour comes via its forum, where a poster says "An un-named source who I have no doubt in trusting has revealed to me that Crackdown is set for some new content."
The poster goes the content "is possibly going to be free" and will include "things like vehicle impounding (taking marked cars back to agency); street racing vs. AI controlled cars, extra equipment, new agent outfits and a number of new mini games."
