There's at least one F-22 pilot on here... perhaps he will chime in.
In the meantime, based off of talking to the 90FS guys at Elmendorf late last year, the problem is money. There are lots of things that they want - even 'simple', low cost things like JHMCS - but there is not enough money for them all, and the list gets longer not shorter. Remember that the Raptor is still waiting to get AIM-9X (or at least it was late last year)!
So, the likelihood of them getting the F-35's DAS and associated HMD is pretty remote. Perhaps the best opportunity for something as significant and complex as this to work its way into USAF airframes would be if the jet is sold to Japan or another FMS customer that specifies they want it and can therefore fund its integration. But even that still leaves considerable costs to pay for the hardware and depot level modifications that would be required...
Plus, you have to ask the question as to whether the F-22 community actually need it. The guys I spoke to said that something like JHMCS would be great for letting them put a TD box over a BVR target, but it would be something of a luxury, for example. There might be an argument that, while no pilot is going to turn his nose up at something that gives additional SA, the Raptor pilot already has an excellent suite of sensors that would make something like DAS another 'luxury'.