I'd have been all over a virtual synth museum of classic mono synths like: ReKat, ReProdigy, etc. But I guess there are too few of me and too many of you (not meant as an insult in any way, just the reality), to have that make any sense from a business perspective.
Depending on what U-he does in a potential Diva 2, that may be a way to do some of this. Like put some poly Kat modules in there (filter), or maybe model the Prodigy sync and add it to the Minimoog oscs (there's already sync, I know).