I would like an f/1.8 / f/2 short zoom (standard to tele on APS-C would be fine) with close focus ability. Size and price be damned!
Edit: Posted before I saw this -
altitude604 wrote in post #13590853
EF 14-85mm f/2
Would be sick on a FF body.
That is wider and longer than I would need, but yes, I'd take it. I think a more realistic range would be 16-70mm at most, most likely 24- or even 28-55mm to be realistic on the price, size, and weight (although I doubt the lens would be as troublesome to use as the Sigma 120-300mm f/2.8, so I would be happy even if it was as heavy as the 70-200mm f/2.8 II).
A longer TS-E than 90mm would be good, as would be a faster TS-E (i.e., TS-E 90mm f/2 instead of just f/2.8).
Also, while it's not a big deal for me, the 200mm f/2.8 is a 1996 era lens and is currently eclipsed in raw resolution by the current 70-200mm f/2.8 II zoom lens. An update would be able to at least match the zoom, and would likely improve upon it in every way (for example, better blur character).