Are you talking about cosmic events such as galaxies being born or dying stars or are you talking every single that can possibly happen regardless of factors?
Also here's an interesting one, are you taking things on the planet earth and man's interaction into account?
The reason I ask is no matter how long the universe lasts I doubt random elements would ever conspire to create a Chevy Nova or a Ham sandwich.
But if you're asking if the wind blows on tuesday would it ever blow on tuesday again...I'm sure it would....
Edit: And also there a multi-verse theories that state that everything that could possibly happen is happening right now somewhere in any number of infinite parallel universes.
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