The new series ended its first arc recently, introducing five new mutants and establishing the team's dynamic, but mostly focusing on team leader Hope Summers.
Generation Hope writer Gillen will explore the primitive Teon in the book's next story arc, where he will deal with the question of whether or not he is mentally able to serve as an X-Man.
"The Teon you know now and the Teon you'll understand at the end of issue #8 are very different people," Gillen told Comic Book Resources. "It's about Teon and examines the question of whether or not Teon should be with the group.
"The core questions in issue #8 are, 'is Teon mentally capable?' and 'should he be returned to his family?'"
Gillen will then focus on the normally reserved Idie across Generation Hope #10 and #11 in an effort to continue fleshing out the fledgling team.
The writer also revealed that he plans to deal with Wolverine's feelings towards Hope in an upcoming issue of Uncanny X-Men, and teased that the reason Logan has been avoiding Hope is likely to surprise people.
Generation Hope #7 will be published on May 18.