Mark Millar returns to "Ultimate Fantastic Four", and he's brought X-Men: Phoenix - Endsong superstar Greg Land with him! Even in their short careers, the Ultimate FF have seen a lot of amazing things - but nothing will prepare them for the world they're about to enter! Reed Richards has used his scientific genius to contact an Earth in a surprisingly familiar parallel dimension - and he's ready to visit! Plus: The shocking secret of the Storm family is finally revealed! Locked away at the bottom of the ocean for 5,000 years, Namor the Sub-Mariner's Atlantean tomb has been breached; now, he's back to rule a planet. This is a Namor you've never seen before with a vastly different agenda. This is ultimate Namor! It helps you learn about the ties between Atlantis, the Ultimate Inhumans and the super-races that existed before man ruled the Earth! It collects "Ultimate Fantastic Four" No. 21-26.