I would like to see Sigourney Weaver's Ripley in "Aliens" and Halle Berry's "Catwoman." I think it would be an interesting display of strength and determination (Ripley) vs flexibility, cunning, and nimbleness (Catwoman). Both are fierce.
I'd like to see Hannibal Lecter meet Jar-Jar Binks. I feel that upon meeting the annoying-as-heck Jar-Jar, Dr. Lecter would literally make mincemeat out of him. And I'd be ELATED to pay full ticket price to see that!
Most likely Lupin 3rd and Sigourney Weaver's Ripley from the Alien franchise. I'd put those two together mostly because one of the characters of the former's series, Fujiko Mine, resembles her quite a bit for her sort of "action girl" role in film. There's very few who can pull off such a look like Sigourney Weaver, and there's few who are worthy of being paired with sweet talking, imaginative acrobat Lupin 3rd.