I initially assumed it was a solo mission because of the unknown whereabouts and special equipment the -22 utilizes. I understand the -22 has an intra-flight data link allowing other 22s to share information regarding fuel, weapon status, gps position etc. Someone with more knowledge of this system might be able to enlighten us more. However, this being a night sortie, and these aircraft likely utilizing IFDL under the conditions you noted, I'm curious as to how exactly this aircraft seemingly vanishes. Like you said, anything could of happened. I hate drawing to conclusions with literally no facts, but is it safe to say there is a slight reason to believe this aircraft may of experienced a catastrophic systems failure?

It will be awhile before the facts are out, but it probably seems like an eternity for the pilot waiting to be rescued. I hope he's found a way to stay warm.