The cat/yammi teamup on the Viper has no relevance to mountain sleds, other than yammi giving up on the mountain segment. AC could license the yammi DI tech, which they need. Word is yammi is blowing out the Nytro mountain with big rebates to dealers - the yammi dealers in the west will be the ones who get hosed. The flatland dealers are gonna sell alotta Vipers. AC will NEVER give up on sleds.
I think the Nytro motor in a ProCross chassis is all about taking on Doo in the trail market, and it's biggest sub-segment - 600 class trail twisters. Doo has over 50% share of that sub-segment - you rob banks because that's where the money is. Yammi hasn't been serious about the mountain segment for years, just maintaining it. Great time to buy a Nytro cheap if you ever wanted one.