We've finished up the first few rounds of chassis modeling and simulation already.
Basically, we started 2 months ago and hoped the rules don't prohibit anything we've already done. This is extremely challenging as some of the specifics of the new rules (which have been loosely 'proposed changes' for years now) have a huge impact on the powertrain development we could be doing, so we're forced to develop to a guess and hope it's right.
On a related and unfortunate note, the clean snowmobile challenge rules have not yet been released either with almost 6 months until competition.