The design for Chopper (a.k.a. C1-10P) was inspired by early Ralph McQuarrie concept art for R2-D2, with significance placed on the arms that fold out of Chopper’s head.

When a fan asked Trevorrow about the concept art on Twitter, the filmmaker replied, “Yes, this is from Duel of the Fates. But I’d never kill R2…he just took a bad hit. Happens to all of us ...

Leaked concept art confirms what Colin Trevorrow's Star Wars Episode IX ... this is from Duel of the Fates,” before referring to a concept image depicting C-3PO seemingly mourning a charred R2-D2.

R2-D2. Ralph McQuarrie. ... McQuarrie often introduced his own ideas into his concept art, but his sinister alien face for the Emperor was one thing that didn't make it onto the screen.

R2-D2 had more a of a “Steampunk,” busy aesthetic. Chewbacca had more of an Ewok look than the tall, lanky Wookie we know and love. Leia still had buns for hair.

Responding to a fan on Twitter who asked whether the Star Wars concept art – which includes Rey’s double-bladed lightsaber, as well as R2-D2 seemingly dying – was legit, Trevorrow said ...

For the three prequels that came out in 1999, 2002 and 2005, the Lucas Museum of Narrative Art "collected pretty much everything we could." Here, Obi Wan Kenobi's Jedi robes.