I wonder if instead the Protagonist role gets handed off one or more times. Possible players of this role: Mufasa, Nala, Simba. That seems simpler than trying to make Scar the protagonist, which isn’t compatible with the Outcome of Success (Simba and Scar are definitely working toward different goals at the end, and Scar definitely fails).
I agree with Jim on the Timelock, this was clarified by Chris a bunch of times in the other thread: Timelocks Always Fixed?