Hottest as in what I think is the most appealing, or hottest as in most anticipated?
I love the Suhali range the most (Suhali Speedys, anyone? ), there's huge anticipation on here for the Amarante and Miroir Lockit. I think the LVOE2 totes are lagging behind these two. Could be wrong though!
Permanent: Azur currently is very popular
Current Limited Edition: Olympe bags
Future Limited Edition: amarante Vernis & Mono Degrade bags are very buzzworthy right now!
For future releases I'd say the Mirage line in the fall winter collection but most of the other I agree with if you need it you can see more details in the Fall?winter summary (first link in sig start page 19 onwards for full updates)