FWIW, Brent Spiner's idea for a Nemesis sequel, which he described as a "Justice League of Trek", would have involved some Voyager characters.
Voyager just didn't have the connection to developing history in the Alpha quadrant - that was explored through TNG and DS9, and what most fans seem to want is what happened next. That's not to say that Voyager cast couldn't be used, but a Voyager project wouldn't cut it.
I (and probably many others) had an idea for a TV movie / miniseries format which although very fannish, could've been great :
Teaser - NX01 Enterprise has a brief encounter that has a knock on effect over a hundred years later. Fast forward to post Nemesis - an issue from the past affects Starfleet, in the course of its resolution involving some personnel / cast from ALL of the old shows, including some flashbacks to TOS or movie era Trek done with old clips and new CGI (as in Trials and Tribble-ations) as Kirks crew had had a similar encounter, since highly classified.
This sort of approach has worked nicely in the novels on multiple occasions and would easily accommodate fans of each show.
Unfortunately, it would be hugely expensive and poorly viewed.