EXCELLENT THREAD !!!
I believe have responded a "formal" FSM poll time ago (when was the last one???), but without having at hand what I responded then (and the U VIII has already been released!) I can contribute with the following "nice-to-have":
1- Combattante Class fast patrol boat, 1/72, with "lots" of options to allow different versions (maybe upscaling the 1/144 Revell-EUR kit? )
2- Any (or several!) small german warship, in 1/72 (minesweeper, R-Boat, MFP, etc).
3- A Fletcher Class destroyer in 1/72, why not (that would be HUGE, boy! )
4- Any cold-war or modern Soviet/Russian small warship in 1/72 (OSA, torpedo boats, etc).
5- All the "small" U-Boot (Biber, Seehund, type XXIII, etc) also in... 1/72!
6- And for now will end with... a Type IX and XXI (in which scale can be? hmmm... 1/72!)
I apologize for the "odd" naval scale, but 1/72 (and 1/76) is my personal choice for tanks & aircraft, and I already have most of the ship kits in that scale.
Ah! And please in injection moulding (mainstream or not), just to reach a wider audience (I still don't dare Vacs, and Resin is way too Expensive!).
Cheers from DownUnder,
Diego.