I'm no insider, but I was at VMX-22 a few weeks ago, and those guys had no idea what the syllabus is going to look like. I'm a south park IP now and have done a lot of work with selections, and there's NOTHING on the horizon at all. The V-22 has almost a year of OT&E left before the FRS fully stands up. I don't know what a boot would contribute to that. I'm just a lowly company-grade, so I might have to owe a few beers on that one, but I don't buy that studs will select V-22s in 9 months. Actually, if that happens, drinks are on me.
Personally, I think the multi-engine aspect isn't as closely tied to flying the V-22 as one might think. The biggest thing to take from multi training is handing single-engine EPs. The V-22 has a "sync-shaft" connecting the rotors if one engine fails, so the handling will be completely different. They could do F/W form and RIs, but I think the value added would be minimal. You should have a handle on that stuff from "primediates."