I wouldn't mind Avenger Academy but to call it Marvel version of Young justice i think New Warriors or New Mutants fit that bill better. New Mutants can give the old team new team vibe that young justice has plus they have tons more story to tell then AA. If given a choice this my order for teen marvel cartoon
-Wolverine and Xmen-The current comic would make the perfect show
-New mutants-Large history and two classes of characters in school setting to work with
-Young Avengers/AA Hybrid-If you mix and match it become something special
Wolverine and the X-men, IMO, would be most likely to get made.