I also think it is smart of Tucker to use the momentum of his firing while it is still fresh in the minds of people: Rather then waiting for too long, he decided to it now and thus increase chances significantly to carry over many of his TV watchers to twitter and even expand that audience. If he would have waited for months or years before coming back, chances are, that many people would have just lost interest and/or forgot about it.
So, it looks like he will soon just carry on with a pretty similar show on twitter while he can take off some of his cloves he had to wear on Fox. Which will make the show even better!
I also think that he will probably expand his long format interviews with interesting people and add new content. He has freed himself from quite some shackles!
And all this will likely just be another big blow for the old mainstream media! I think Fox and co have shot themselves royally in the foot, yet again. They have miscalculated, again.
He also probably had clauses in his contract that he can't go to podcasts or speak at events without permission. So we can look forward to him making the rounds, and he has proven that he's brilliant with such free-flowing formats too!