Wolverine's brother, Dog Logan, as first seen in the Origin series ,was last seen properly in the time-travelling epic Astonishing Spider-Man & Wolverine #6, in which he travels from the past to the present at the very end of the story.
He was then briefly seen in Wolverine #304, checking out the new Jean Grey school mentioned in the newspapers.
And now? Well…
WOLVERINE & THE X-MEN #25
Jason Aaron (W) • RAMON PEREZ (A/C)
"Things to Come" Variant by ED MCGUINNESS
• The hottest new X-Book turns 25!
• Jason Aaron (THOR:GOD OF THUNDER) and Eisner-Award winner Ramon Perez (Tale of Sand, JOHN CARTER) kick off the mega story that will define WXM in 2013!
• Wolverine and the students go to the Savage Land!
• Wolverine's brother Dog, from the super hit ORIGIN, returns and becomes the biggest new X-Villain in years.
Biggest in years, eh?