"Dream's End, Chapter 2: Pressure Points"
Scott and Jean return to the Xavier Institute to help with Charles, whose mental state has taken a turn for the worse. They arrive just in time to see the X-Men dissolve around them.
Meanwhile, the Mannites are having a crisis of their own. Nina is called in to help the new Beautiful Dreamer.
As Charles alienates all those around him, forcing them to all go in separate directions, Nina is able to contact Jean for help. Jean, Scott, and Logan decide to take on the X-Men mantle themselves to aid the Mannites.
The adventures of Jean, Scott, Logan, and the Mannites continues in Astonishing X-Men (1999) #1.
SPOILER: It was revealed in Uncanny X-Men (1981) #375 that the Wolverine in this issue was a Skrull imposter.