“There are still numerous prophecies waiting to be fulfilled. Everything in Revelation for instance.”
Nope. Everything in Revelation has been fulfilled, right down to Vespasian’s legions encamped in the Valley of Meggido (Armageddon) on their southward march through Samaria to Jerusalem.
Christ’s kingdom is His church - which is His body - over which He is the head. If you are born again, congratulations! You’re already in His kingdom: a kingdom of heaven, not earth.
If so, then why are there still living things in the sea? Why is the devil still doing his evil work in the world? Why has God not created the world new yet?
I'm not sure whether you actually believe what you are saying or if you are just trolling. The ridiculousness of your arguments seem to favor the later theory.