I wouldn't mind seeing another Miami/NY crossover before one or both shows end. I've always liked the dynamic between Mac and Horatio, so that would be interesting to see one more time, if the story were compelling (didn't really care for the last mega crossover).
Not sure if I'd be as excited to see the original crossover with the other two, but it might be neat to see NY and CSI work together exclusively (ie: More than one character crosses over and/or more interaction between characters) for an episode.
For what it's worth, I wouldn't be completely adverse to seeing a crossover between Miami and Hawaii 5-0, either (mostly because the tone of both shows visually and arc-wise are similar enough to warrant it, in my mind. Though H50 in itself is slightly more realistic, if that's possible, ha!) :lol: But then we'd have to assume that NCIS:LA is in the same universe as CSI because of the mini crossover they had with H50.