Captain America by Ed Brubaker #1

In "null," a mysterious rift in time and space ties past and present together when a group of wartime agents—once trapped in the surreal "Land of Nowhere" by the enigmatic Jimmy Jupiter—now lead a rogue operation from an AIM base. As Captain America and his allies close in, the line between memory and reality blurs, and Sharon’s dreams become a battleground where the past reaches into the present.

In "null," Captain America finds himself stranded in Jupiter's Land of Nowhere, a realm outside time and space. With Hydra and Bravo closing in, his allies race to locate the ancient Jupiter before his power is twisted into a weapon capable of merging the Land of Nowhere with Earth.