It sure looks like the main plot of this season is going to be Michael and the Disco crew figuring out what caused The Burn and fixing it, thereby restoring the Federation. Just for fun, let's translate that into a contemporary setting. Let's say a Turkish sailing ship from the 1400s is thrown forwards in time and washes up on the shore of the Mediterranean in 2020, and one of the first things they learn is that the Ottoman Empire fell 100 years ago after World War I.
"Ah," they say. "So all we have to do is find out what caused this 'World War I', undo it, and the Ottoman Empire will spring back into existence!"
Of course that's crazy. But that's basically where Disco is going this season. It's a shame, too, because the idea of our crew thrown 900 years in the future with no familiar reference points and only themselves and their ship to rely on was a really great premise. But like the producers of Voyager 25 years ago, they're afraid to commit to it.
Instead, Michael and friends are going to figure out what caused the Burn and fix it. The season finale will end with a montage of Federation starships visiting Earth, Trill, etc. to welcome them back into the fold accompanied by a patented Michael Burnham Grey's Anatomy Voiceover that goes something like this:
"Sometimes, when hope is lost, all we have is the stars. But in the stars, we find each other. And in each other, we find strength. In in that strength, we find the courage to look within ourselves and find the hope that was never lost at all."
And then a giant Borg cube will appear at the last second to give us a cliffhanger going into Season 4.