DominicCobb said:

Revenge of the Sith. It would explain why Palps knows everything.

This would be funny if Palpatine and Anakin were watching ROTS at the opera house, and just after he watches the scene where Mace Windu and Ki Adi Mundi talk about sensing a plot to destroy the Jedi, he says the line "the Jedi are planning to overthrow me."

To make it extra meta, the hologram Mace and Ki Adi are standing at could be showing Palpatine saying "once more the Sith will rule the galaxy!" to which Mace states "I sense a plot to destroy the Jedi."