All of the above. 24 Captains. I mean, the Enterprise-A had three, so we have to top that. It would make use of the massive ready room.
Captain Saru, Captain Burnham, Captain Tilly. We may not have enough weapons or troops or ships, but we've got plenty of captains.
Depends on whether that year with Ferris was real or all in his head. Captain Tilly *was* in command of the MU Discovery, so perhaps for whatever reason that suggestion, at least, isn't that farfetched if the symmetry somehow gets maintained? Perhaps whatever happens in the next episode(s) causes them to end up with an older Tilly with a bunch of experiences that occur in a closed loop temporal event. (And who is Mary Wiseman's actual age or - given the way humans age in the 23rd/24th century - even a decade or two older than her.)
In retrospect, it probably would've been better to simply use the original names Mirror Bashir said in that DS9 quote I posted... now it just looks like I was snarking
The 20th/21st century actor cryogenically frozen and then inexplicably made a Captain 240 years later? Sure.
In that case, Captain Jason Isaacs. Complete with him not having a clue why everybody's looking at him like that.
Fuck Yay! Also calling it now: at the end of the series in six-ish years or so, Tilly will become captain of Discovery and sail off into the sunset.
I'd say all of the above. I know I saw the showrunners claim that the plan was always that the first season would be "Burnham's story" - with the implication that the following seasons might focus on another cast member, or no one in particular.
Six or seven seasons is about average for Trek and other shows, and I very much doubt that CBS will abandon their golden goose, which is the primary driver of their streaming service.