Synopsis
Thanos has Rick Jones captive on Titan. We learned last issue that since Iron Man #55 he's taken over his homeworld. He wants a secret from Rick's brain which will enable him to conquer the galaxy, so he copies Rick's mind into the computer ISAAC. To check that the copying has worked he replays the events from the last 2 issues:-
Thanos had sent Super-Skrull and another Skrull against Captain Marvel disguised as several old foes, and then tricked him into fighting the real Thing. At the end of the battles Thanos revealed himself and caused CM to swap into RJ, which no-one else had done before. Rick's hands are now cuffed so he can't clash his wrist-bands together to get CM back.
The replay doesn't mention that Thanos has been using Iron Man's foe the Controller to put his control discs on lots of officials in a plan to take over Earth. One of those controlled was Rick's girlfriend Lou-Ann, who was made to betray him. Rick sent her to the Avengers for help removing Controller's disc.
We now learn that the Titan is after the Cosmic Cube, and ISAAC extracts the its co-ordinates from the copy of Rick's mind. Thanos goes to Earth to retrieve it. But before leaving he gives Super-Skrull his personal Unisphere which he promises will protect him against Drax the Destroyer or any other attacker. But Drax confronts Thanos on Earth.
Meanwhile Lou-Ann reaches Avengers Mansion with Rick's Avengers card, where she collapses into the arms of Captain America. Black Panther, Iron Man, Scarlet Witch and Vision are also there.
Rick is rescued by Thanos' brother Eros and their father Mentor, the last free Titanians. And to their surprise he turns into Captain Marvel. Mentor blasts their way past some guards into the Hall of Science, where Super-Skrull is using ISAAC to find out how Rick knew where the Cube was. CM beats on the Skrull, as the Titanian duo hold back more of Thanos' alien goons.
In the background ISAAC explains what happened at the end of the Kree/Skrull War. The Kree Supreme Intelligence had used a power within RJ to end the war. But when CM was forced to re-merge with RJ to save his life, SI reckoned that RJ might have lost his power. So he implanted the location of the Cosmic Cube in his mind, for use in an unspecified universal doomsday.
Super-Skrull uses the powers of the Fantastic Four against Marvel, but to no avail. And Thanos' men flee the resulting devastation. Eventually the battered Skrull calls on the Unisphere to destroy his enemy. But nothing happens because the device is useless, ans the Skrull collapses.
The heroes came to the Hall of Science because ISAAC would contain not only Rick's mind but also Marvel's. And Thanos would be able to use it to predict CM's actions against him. So they erase the memories from the computer. Then Mentor sends CM to Earth and the Avengers.