Microsoft have confirmed that the first piece of DLC will be released on Xbox LIVE on the 7th April, which may mean that PSN sees it on the 8th.
The new content seems to be named The Chevalier Ice Breaker DLC , allowing users to gain access to a pimped up Ice Cream Van.
There is no price for the new content yet, but as soon as we hear anything we will update you.
Thanks, PS3 Trophies