Marty wanted to pinch himself.
He’d just seen the DeLorean destroyed, just realized he’d never see Doc Brown again…and watched another DeLorean materialize.
“Marty!” Doc Brown jumped out, but he wasn’t in Western gear. Instead, he was dressed as Marty had last seen him in 2015.
“Marty, you gotta come with me! We’re the only ones who can stop it!”
“Doc, stop what?”
“It’s the alternate timeline! Biff Tannen! He’s going to be President unless we stop him!”
The alternate timeline, where Biff Tannen had killed his father…
Here we go again, Marty thought... "Can I change first?"