Somebody made a suggestion that gives me a new worry--although I don't take it too seriously. The premise is that the originalists will overturn DOMA in order to bolster their infatuation with states' rights. Hence, we might actually be looking at a 7-2, 8-1, or 9-0 decision overturning DOMA.
The danger here is that SCOTUS insert a poison pill in the majority opinion which forces the Ninth Circuit to reverse itself if Perry is sent back.
Frankly, however, I don't foresee the feigned regard for states rights overwhelming the conservative's desire to deal a blow to gays.
While literally anything is possible, what's most PROBABLE is a 5-4 or 6-3 decision overturning DOMA. I think it's pretty obvious now that Prop 8 will simply be held until the DOMA issue is dealt with.