Mother Talzin was last seen in "Revenge," an episode from Season Four of the series. Her story is not over yet.
The script specifically says the heroes ride off "like the end of The Last Crusade."
Mace advising Jar Jar not focus on his anxieties is the same advice Qui-Gon gives to Padawan Obi-Wan at the start of Star Wars: Episode I The Phantom Menace.
One of the starting points the crew explored regarding the unlikely pairing of Jar Jar Binks and Mace Windu was the 2005 comedy The Man, which teamed up Samuel L. Jackson and Eugene Levy.
