Shadamy: 12Years Later: A New Dawn

It has been 12 years since Team Sonic defeated the past threat, Ultimatum, and many things have changed, since then. There are no more wars; no more struggles; no more pain. Everyone has grown and moved on. Out of everyone, Shadow and Amy have changed the most. Their former wounds have healed and they soon realize that they're not so different after all. It is a time of peace... but evil never rests. There is a danger growing in the darkness. As Shadow and Amy grow closer, their lives and all of Mobius is hanging in the balance. What is this new threat? Are they new or old enemies? And what could they possibly want in Nullspace?