The Mighty World of Marvel #48

In "The Avengers Meet...the Sub-Mariner!", the Avengers grapple with the fallout of the Hulk’s departure, fearing the chaos he might unleash. When they track him down, a fierce clash erupts—only for the Sub-Mariner to intervene, sensing a threat to his underwater realm. With tensions high, Namor and the Hulk form an unlikely alliance, turning their focus toward the Avengers in a moment of shared danger.

In "Encounter under the Earth!", the Mole Man lures the Fantastic Four to a remote island with a clever ruse, exploiting their neighbors’ complaints to draw them in. Once there, he springs a trap beneath the surface, setting the stage for a clash deep underground. With the Thing, Invisible Girl, Human Torch, and Mister Fantastic facing off against the Mole Man and his moloids, the battle for control of a hidden realm begins.