I voiced an idea years ago, but it could be reworked perhaps.

What if GEONOSIS is a secret superweapon, which utilises a secret technology to jump around the galaxy to launch surprise military attacks. It would have the ability to just churn out Droid armies.

I figured that the film could open with the Jedi Arena attack, and it’d just disappear as they make their escape in orbit. Part of the whole film would have the Jedi searching for it - Obi Wan would follow Jango Fett and find the planet, allowing the Republic to make an invasion with the Clone Army.

What if at the climax it makes some sort of faulty jump and it’s assumed it’s destroyed. In the ST it has been rediscovered (as EXEGOL) ready to create droids that are much more terrifying?