Suggestions:
Battle of the fates.
The Final Order.
The Phantom Shadow.
An Ancient Fear.
Balance of the force.
Eternal Throne.
Generally speaking, I’m strongly against changing titles, as I think it should be clear which film it is, and that it’s the same one everyone in the fandom refers to.
That said, if I were to rename films, while I think Rise of Skywalker is perfect already, good alternatives would be The Eternal Throne, The Throne Eternal, and The Empire Eternal. Balance of the Force would work too. That said, I don’t like multiple SW titles having the same words in them (besides small ones like “the” and “of”, obviously).