Some of the inserts from the Skeet Surfing sequence from Top Secret! might add a bit of pizzazz to the already chirpy sand dream.

Anakin could have killed the sandpeople because they are SANDpeople, "They lived like sand, I slaughtered them like sand! I HATE THEM".

You could also mix in Charlton Heston in the Soylent factory into the droid factor sequence.

At the end of the film while the big ships take off you could edit him bumping into people in the city with the street denzens of Coruscant crying out that. "Soylent Green is people!".