-Lightsaber duel at the end of TPM
-Darth Maul
-Pod race
-Jango Fett, even if it did kind of spoil the mystery of Boba Fett. I suppose it was more about seeing a Fett in real action as opposed to very little in the OT.
-Obi-Wan flying around the universe on his detective mission.
-Anakin executing Count Dooku
-Order 66
-Palpatine/Sidious pure giddiness over being able to show his true colors of evil
-Obi-Wan vs. Anakin/Vader
-The twin suns of Tatooine
There's more, but that's all off the top of my head.