Why are we seeing the original Imperial star destroyers in the new Episode 9 trailer? Did Marty and Doc Brown show up with the DeLorean and reverse time back to the old Imperial days?
Why does C-3PO have red eyes? Maybe the Brightburn kid possessed him.
Finally. Why is Rey Rey holding a double-sided red lightsaber like the one Darth Maul had? Is it possible Rey Rey will finally become an interesting character? It appears everyone online is geeking out believing Rey Rey has joined the Darkside.
One rumor has Rey Rey being a clone created by Palpatine. But let's be honest here. The likelihood of Kathleen (The Force Is Female) Kennedy allowing her Mary Sue (the most powerful force in the galaxy) to be nothing more than a clone conjured up by Palpatine is next to zero.
I think the most likely answer. Rey is experiencing a force vision like the one Luke had in Empire.