Board Thread:WARNING ALL USERS False Info\Spoilers/@comment-69.114.214.100-20130731080408/@comment-65.92.243.16-20130803042730

I doubt he can become a good guy again, unless he is forced too change. For example, if the protagonists managed to capture him, then Peter, Derek or Scott erase anything linked to dark Deucalion from his mind and only the previous Deucalion (before Marco tried to challenge him) remains.

I still believe that it is unlikely though.