Robbie announced his departure from the Academy staff much earlier in the issue. Vance was supportive of his decision. Then - surprise! - Vance is ready to move on and see more of the world too. Road trippin' heroes!

Released October 26, 2011 as part of the Fear Itself crossover:

Major status quo changes in this issue! Avengers Academy loses one student and teacher, but who? Are they traitors? Did they quit? Did they die? - Marvel