It's in the works, for sure... at least AIM-9X is within the next year or two. JHMCS is still unfunded for the Raptor (I've heard projections it won't be seen until they can evaluate the JSF-type helmet for it)
I was in the Joint Tactical Air-to-Air Missile Office (JTAAMO) USN/USAF FO/GO oversight council meeting in 1993 as the Navy lead action officer and go to hear the Air Force take a pass on opportunity to integrate AIM-9X
and JHMCS on the F-22 from the start. It was interesting to watch them protect F-22 at all costs and then even try to constrain AIM-9X/JHMCS for the F-15 (F-15C was USAF lead platform). They foresaw challenges to the projected F-22 buy and did not want to improve the warfighting capability of the F-15 so that it did not need to be replaced.
Even more interesting was the USAF Studies and Analysis brief on force on force encounters between all USAF and USN projected AIM-9X/JHMCS aircraft and the Su-27. No matter what happened, after looking at tens of thousands of runs starting in BVR conditions in OCA and DCA scenarios, there were always merges no matter what BVR weapon(s) were used even by the then still very close hold cosmic F-22. In fact, loss of even a few F-22s made the Cost and Operational Effectiveness Analysis (COEA) very interesting in a not so good way for the F-22 due to its high unit cost.
The Air Force took a position that there would be no merges because improved AMRAAM was so lethal and then claimed that they didn't think the F-22 needed any type of AIM-9 at all and had already gone from a loadout of 4 internal AIM-9 to two AIM-9M as a result. Ultimately, AIM-9X and JHMCS were moving too fast (in RDT&E time sense) for F-22 to incorporate either for the first production lots (similar to Typhoon not having a "helmet" trageting system until later tranches). F-22 was already behind schedule and over budget and didn't want adding anything that would make that worse at the time so AIM-9X and JHMCS were deferred.
F-35 started its development as JAST in spring 1994 (I was at that meeting as well) and that program had sipped the F-22 Kool-aid (first JSF PEO came from USAF ACC DR and had participated in all of the JTAAMO FO/GO meetings). Interestingly, JSF was all over the "helmet", but competitors wanted to do it themselves and go beyond JHMCS (so much for "Joint" and common helmet strategy), but used same arguments as F-22 as to the end of merges due to stealth so AIM-9X was not considered a priority and a loadout of 2 AMRAAMs was selected in lieu of AIM-9X. From the start, the priority was air-to-ground so AIM-9X was shuffled to the back of pack.
So AIM-9X was integrated onto the F-15C in the USAF as the lead platform and F/A-18C for the Navy and Marine Corps. F-16C and F/A-18E/F became the next wave (Navy switched F/A-18E/F to be IOC platform for JHMCS even though it had almost completed DT on the F/A-18C, but that's another story).