Kate Mulgrew was reportedly in fierce negotiations about her contract renewal after season six, namely that everybody else had signed up and it looked for a little while like she wouldn't. From an interview published at 'Get Critical': Now, obviously she did, as it says, ultimately sign up for season seven. But... what if she didn't? How would you have liked to have seen her written out of the show? How do you think it would have shook up the cast dynamic going into year seven? Personally, I'm glad she didn't leave (I like Mulgrew), and I can't for the life of me imagine a version of the show where Chakotay is promoted to top tier. Nor would I want to. So, maybe one of the other characters is made Captain... who, I don't know. Tuvok? He'd be the next in the chain of command. Or maybe the EMH could have made his 'Emergency Command Hologram' permanent? As for how she could be written out, I'd almost like to have seen her survive, but branch out on her own with a group of others. Payback on the aborted potential of the 'Maquis' storyline by creating a schism among the ranks about how to get home, with Janeway and her supporters going off in the Delta Flyer, while our 'regulars' continue in their own way. There were hints of this kind of thing: wasn't there some friction between her and Chakotay in "Equinox" part two, for example? Or am I thinking of another episode? Something to do with the Captain being holed up in her quarters for weeks and morale on the ship being at an all time low. And then, of course, they could always have brought her back as a 'special surprise' in Endgame. Or not.