Lance wrote:

A very fannish notion it might be, but I'd have liked to have seen a 'proper' crossover between TNG and DS9. Maybe as one of those epic sized two parters so that they could afford to employ more than one of DS9's cast to appear. 
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When the two series were airing simultaneously, I wished they had a done a two-parter like that, with the setup on TNG and the resolution on DS9. It could have included a scene establishing Worf's interest in the station, though at that point they probably weren't even considering it.
Edit: Apologies to
BillJ.