Board Thread:False Info and Speculative Discussion/@comment-29386156-20160801103721/@comment-5237598-20160801105046

The Alpha pack didn't return because there was no Alpha pack anymore. Jennifer killed Kali, almost killed Ethan and Aiden in their merged form, which cost them their Alpha spark (they wanted to be in Scott's pack after that) and Deucalion killed Ennis. We can only speculate why Deuc killed Ennis. My guess would be that he lost his fight and showed weakness, but who knows. Scott went head to head with him (eventhough he was still in transtion and not yet an Alpha) and stood his ground. Then Ennis and Derek fell very deep. I would imagine that this could have made the pack lool vulnerable. One of ist members was defeatable... But These are only my thoughts, please do not consider this Explanation as canon.

I would like to add that Deuc was considered a visionary, someone who tried to work with the hunters in the quest of peace. He turned into this Monster after he was betrayed by Gerard and lost his human sight. At the end of S3a, Scott and Derek give him a second chance which Deuc obviously took since he helped Scott against Theo and la Bête du Gévaudan.