Justice League of America #17 - comiXology

Written by Dwayne McDuffie and Alan Burnett; Art by Ed Benes, Jon Boy Meyer and Sandra Hope; Cover by Ethan Van Sciver

Double
trouble for the League! First, in the lead story written by Alan
Burnett, a mysterious and familiar team from beyond time has
infiltrated the Hall of Justice looking for a weapon.
Will Black Lightning be their first victim? And wait ’til you see who they are!
Plus,
writer Dwayne McDuffie begins a very special back-up story exploring
what’s wrong with Vixen’s powers. And when her condition worsens, it
leads to a new arc and major change for the Leaguer!