H Series...would be good to have to run a domain and deal with a combination of realm management and personal actions on the battlefield/dungeon
Slaver Series - Lots of intrigue and investigation and ruthless skirmish potential here
Dwellers of the Forbidden City - Stuck out in the middle of the jungle when things go awry
Skarda's Mirror?
I10 - The sequel to Expedition to Castle Ravenloft. Strahd returns, basically.
The Tharizdun one - Descent into madness, D&D style
Night Below - Great then, could be made more great now. Underdark with something other than drow.
I also like the idea someone posted of doing new things like Red Hand of Doom instead of always focusing on the nostalgia angle. It's the only way that we'll get new iconic memories and classic adventures.