Prelude issue to the six part event starting in August 2013.
Includes reprint of "The Final Flower!" fromLogan's Run #6.
Spoilers! (not only for Infinity bit)
On a distant planet a so called Outrider returns (Outriders are genetically produced assassins that serve their masters) and brings a message about a planet known as Ahl-Agullo and another as yet unnamed alien asks someone if this pleases him, the shadowy figure says yes and the outrider goes out to complete his mission.
The Alien appears on Ahl-Agullo and is now revealed to be called Corvus Glaive who demands a tribute and references that planets greatest warrior (Augullox) and mocks the king of the world because that planets savior is the King's son and then shows him his son's blade (Ahl-Quito, the Worldcleaver) and says they killed him. It also revealed that his master came to this world last time and burnt it down and the king gives Corvus a tribute. Corvus returns to his master and gives him his tribute and Corvus' master is revealed to be Thanos who is pleased with the tribute.
Back on Earth the Outrider has reached it and is looking for a tribute and looks down at both the X-Men and the Avengers and then goes to S.H.I.E.L.D where he kills one of the S.H.I.E.L.D agents.