This is actually something I’m wanting to imply in an eventual ROTJ edit with some added Jabba subtitles!

Luke: You should’ve bargained, Jabba.

Jabba: [as Jabba waves them off] Why? Have you seen the future?

Luke: This is the last mistake you’ll ever make.

Shot of Leia being tugged closer to Jabba.

Jabba: [added line] Your vision fails you, Jedi.

I might not do both lines, but it would come right after that head nod like you mentioned. I think there are some really good explanations of their plan, but I think audiences would accept their crazy plan even more if the idea that Luke saw how events would unfold was hinted at. It also sort of parallels how the Emperor foresaw how events would unfold in the final act as well. In this version of the story, both Luke and the Emperor sets up traps for their enemies based on their future visions.