Federico Minoli is on record as referring to it as a 1098, so, that's about as official as it gets.
I suppose it's possible they could go to a larger (still) displacement, but it would be kind of out of character for Duc. My guess would be a 1098 release, followed by a 1099S, then a 11xx somethingorother "R" version.
It'll be interesting to see how they approach it.