if it's 7/4, we'll likely hear an official confirmation towards the end of April, Sony usually officially announces their titles about 11 weeks before street from past experiences.
Well, I really want season 3. My attitude towards the last 2 years is that I would really want the 3 Jill episodes from 4 but besides that it wouldn't really kill me if we didn't get the last 2 seasons. There are about, oh, maybe 600 other series I would like to have more.
I've never seen the Shelley Hack/Tanya Roberts episodes, but would like to just out of morbid curiosity... I saw a clip of "Let Our Angel Live" from the featurette on season 1 and it looked far campier than it was in the 70's