Avengers Forever, Vol. 1 #7A (1999)

Into A Limbo Large And Broad...
The 7 Time-Tossed Avengers invade Immortus' stronghold in Limbo, hoping to find some key to the reason that Immortus is bent on eliminating Rick Jones. Almost immediately upon landing, the chaotic nature of Limbo separates them, leaving most of them to deal with their own inner demons. Yellowjacket finds his way to Immortus' throne room, but is captured almost immediately. The others are forced to withdraw when Immortus' forces attack, leaving Yellowjacket behind, but having gained the Synchro-Staff. Yellowjacket, having faced the truth that he's destined to return to being Hank Pym, offers to help Immortus defeat the Avengers.
Release Date: 1999