It's a Classic DC Mentor-Sidekick Team-Up in TITANS ANNUAL #1 11-Page Preview

The duos are back together to face the classic DC villain the Key.

via The Nerd Machine

http://www.newsarama.com/33787-it-s-a-classic-dc-mentor-sidekick-team-up-in-titans-annual-1-11-page-preview.html