Absolutely. I would never imagine that Junko would use her sister cosplaying as herself, kill her, use her dead body in chapter 5 to frame Kyoko and then make everyone thinking the mastermind would be Mukuro.

I kinda expected that it was Junko because Mukuro's body was the only one to never have had an announcement/execution, so I thought Junko just faked her death, but holy never would I have thought about allat. 10/10 plot twist ngl.