Buffy the Vampire Slayer: Season Eight #17B

Alternate Cover
Time Of Your Life, Part Two
Willow investigates their demon friend, and realizes that the slayers have been duped into setting up a major problem for Buffy in the future. Meanwhile, that future Buffy gets through the requisite first-superhero-team-up battle with Fray, and then starts working with her to investigate this new future.
Release Date: 2008