Now aware of the Fermata Cage's existence and the rumor of a Sith Lord within it, Palpatine takes a moment to speak with Vader. He invites Vader to spar with him using their lightsabers. It is then that Palpatine brings up the Rule of Two, noting that should a Sith Lord emerge from the Fermata Cage, that would make three of them. Without saying it explicitly, Darth Sidious makes it clear that he does not plan to be the one culled to maintain the Sith's only real law.
You can see the full preview below. Star Wars: Hidden Empire #4 goes on sale on March 1st. The issue's solicitation information follows.
Star Wars: Hidden Empire #4
DEC220904
(W) Charles Soule (A) Steven Cummings (CA) Paolo Siqueira
THE ENDGAME GAMBIT APPROACHES!
The final moves of Lady Qi'ra's great game have begun. The Sith have been summoned, and the Fermata Cage will open... For Qi'ra, it's all or nothing.