It's confirmed that the band leader in Madame Garsa's establishment is Max Rebo, making him, Bib Fortuna, and Fett the only known survivors of the destruction of Jabba's sail barge aside from the Skywalker Saga heroes and droids.
The beak added to the Sarlacc in the Special Edition of Return of the Jedi is seen again, but retracted back to the pit.
The kitchen droid first appeared on the transport freighter Anakin and Padmé took from Coruscant to Naboo in Star Wars: Episode II - Attack of the Clones (2002). It starts to swing its knives to attack Fett in a circular motion the same way General Grievous does when confronted by Obi-Wan Kenobi in Star Wars: Episode III - Revenge of the Sith (2005).
The LEP-Series service droid that serves as a rat catcher is a model that was first seen in Star Wars: The Clone Wars (2008) and the subsequent TV series that followed it.
During the flashback, the Weequay guards shout "Keepuna" (Huttese for "shoot") and use the swear word "Sleemo" (slimeball).