Yes, we agree that Satan is not imprisoned yet in the Bottomless Pit, but it is a near future event like Armageddon when the Kings of the Earth are to be judged at the same time as the heavenly hosts.
And yes, Satan is coming as the "Anti-Christ" during the Great Tribulation, but this event is still a distant future event that happens after the Bottomless pit is unlocked after the 1,000 years of imprisonment has run its course to completion and the little while period commences.
PS: - after reading your post I went back and corrected my post that you had quoted.
Satan is up and running in the Great Trib, and goes to the bottomless pit before the Millennial reign, and then after the Millennial Reign, he is let loose for a "season"> and then that ends and He is sent to the Lake of Fire.
Not a happy ending, but on the other hand, when you consider that He has destroyed every human life to some degree, since Adam.... i think that His ending is actually well deserved.