Dissapointingly the DLC will just be a new jacket for V, a new car and alternative appeerence for Johnny Silverhand.
In a recent AMA, a senior developer at CDPR said the following:
"People don't seem to be aware how difficult it is to create patches for a game that has been already launched," he said. "It's a process that takes a lot of 'finicking around' with existing systems. The main idea behind making patches is of course to improve a game, and not to end up breaking it more. How you need to imagine making fixes in a game works like is basically open heart surgery, right? You have this whole system that's sort of been working, and you need to get in and try to fix stuff around stuff without making sure everything else falls around it, or breaks around it."
"These fixes connect to so many other systems that turning one wheel somewhere else will actually cause [something] somewhere else to fall off. You need to make sure you don't mess with the entire system while you try to improve the state of it overall, and that's why sometimes it can take much, much longer to fix even small things than we anticipate."
There isn't a better way to put it: The game is f***d.
What remains to be known is if the new gen version which has been built from scratch, will be easier to patch and improve.