You could also add a throwaway line to the Vader Boba scene that indicates that Jabba might get in the way of their plan. Now that I think about it, this might work better if we enter the scene mid conversation, something like this:

Vader walks off, cut to the Slave 1 approaching Jabba’s palace

Cut to a schematic diagram off the Sarlacc, we hear Boba:
“…I can guarantee that, Jabba rules with fear.”

Cut to Vader in his chamber talking to Fett via a monitor:
“I want him alive”

Boba: “He’s a Jedi, He’ll survive”

Vader: “A fierce plan, bounty hunter, but I hope you do not underestimate Jabba’s temper.”

Boba: “So I have your approval to proceed?”

Vader: “Don’t disappoint me.”

Slave 1 lands near Jabba’s palace