I hope Flashback doesn't go to SFSTL. It would be like Carowinds receiving Carolina Cobra. I would hope a new train is included if it happens. I wouldn't be quite thrilled to see a the Vekoma Ninja and this ride possibly near each other at SFSTL.
The SFGADV Parachute Drop would be the only one left in the chain. I believe it was relocated to the park from SFOMA (what SFSTL was back then).