metabolizes solar energy into his cells for superhuman strength, speed, endurance, reflexes, eyesight, and hearing, nigh-invulnerability, regeneration, x-ray vision, thermoscopic eye beams, high-velocity breath, flight
The Hyperion we know was revealed to be an Eternal in our dimension who had claimed American citizenship as a child, while another Hyperion was a denizen of a Microverse civilization. This Hyperion's personal history is unclear.
He replaced Storm on the Weapon X team. Since he was removed during the Time Broker's membership cleansing, there was no replacement. He was returned to his home dimension in Exiles (1st series) #65.
The Hyperion who recently turned up in Age of Heroes #4 and Thunderbolts #151-153 is apparently the same as this Hyperion.