LOL at WW speedblitzing. How is WW speedblitzing somebody who strikes (and strikes only, reaction would be faster) at near-relativistic speeds and moves faster than somebody who dodges lightning bolts can even see?
Palpatine wins. Even if Diana kills his physical form (which would mean getting past his telepathy, Force Storms, speed & saber strikes, Lightning etc.), she has no answer for his spirit.
Diana's lasso can probably rope up Palp's spirit ----- Re: the time she tied up Darkseid when he was just a disembodied spirit possessing the Earth's population ------- but I don't think it'll get that far. Sidious wins.