He never “finished” the project, but the last video he posted was a bunch of drawings with text to convey the idea (mostly editing and animation ‘notes’). I’d imagine an entire cut of the film with a lot of these unfinished scenes is what he showed Tom Mankewitz.
Yeah, I saw that. Someone here on this site needs to pick up the torch from him and complete this project, while also re-doing those clips now that VFX have come a long way since then (Adywan’s Revisited & Hal 9000’s edits).
I really like how he transitioned from the villains breaking free from the Phantom Zone, to Superman, Lois and Jimmy’s reunion, to the opening credits. Someone needs to do new opening and closing credits that are similar in style to the first film. I am disappointed that Warner Bros. spent so little money on reconstructing the Donner Cut, when they spent a ton of money to restore the final cut of Blade Runner, and especially more recently with Zack Snyder’s cut of Justice League.