Life's been good for Sonic and his friends, but that can't possibly last for long! That's because the once super-powerful villain Mammoth Mogul threatens to revive the Fearsome Foursome — from behind bars! How can he accomplish that, and how will his plan put Sonic’s closest friends in the greatest danger? It's a fistful of mystery and shocking revelations as only Sonic the Hedgehog can deliver! Plus, the classic Sonic team of Mike Gallagher and Dave Manak are back for a brand-new, modern-day Sonic classic loaded with some of the most popular classic Sonic villains including the original version of Metal Sonic known as Pseudo-Sonic!