Unlike the mainstream Skylanders series, the Doom Raiders are still evil in Skylanders Academy. The show itself is set in a different continuity.
So what happens if they are all reformed?
Wolfgang and Pop Fizz will be best buds again, and will be Pop and the Gang once more, Dreamcatcher will once again be a cadet at Skylander Academy, Chef Pepper Jack will still be a most renown chef in Skylands. Golden Queen will lost interest in stealing gold, while Chompy Mage will believe Chompies don't have to be evil, Broccoli Guy will meanwhile be a radio host.
Meanwhile Golden Queen, Wolfgang, Chef Pepper Jack, and Chompy Mage will all be Skylanders Senseis, and Dreamcatcher will be one too after graduating from Skylanders Academy.
The same thing would happen to Dr. Krankcase, Nightshade, Luminous, the Gulper, Pain-Yatta, and Chill Bill too if they ever appear in Skylanders Academy Season 3 as Doom Raiders*hopefully* who are still evil, the five of them becoming Senseis, while Chill Bill becoming a radio host alongside Broccoli Guy.
So here's the pic of Master Eon thanking them for helping the Skylanders ultimately saving Skylands.
Drawn on Comic Workshop 2.
Golden Queen, Wolfgang, Dreamcatcher, Chef Pepper Jack, Chompy Mage, Broccoli Guy, and Master Eon (c) Activision