What If...? This happened in a comic book?

Costume

Superion flew above the Manhattan skyline, his keen super
sight scanning for crime below. He spotted the costumed
megavillain Hippo on 44th Street and 8th Avenue, walking
behind a woman wearing a trenchcoat. He shook his head
-- another one of his enemies had escaped from Riker's
Island.

The woman screamed. She had turned and spotted Hippo,
who now approached menacingly. Superion, who not only
could fly, but also was superstrong and invulnerable,
swooped down quickly.

Hippo was not to be taken lightly. He used mechanical
jaws built in to his helmet to tear his opponents from
limb to limb, and his suit gave him superhuman brute
strength. His gray imposing figure struck fear in the
hearts of policemen around the city. Superion quickly
assessed the situation, and decided a direct strike to
Hippo's head with his meteorite-powered fist would do the
trick.

Square jaw firmly set, 6'5" god-like frame whizzing
through the air like a missile, he slammed his
fully-extended fist into the side of Hippo's helmet. The
blow sent the supervillain hurtling off the sidewalk and
down an alley, finally crashing into a brick wall at the
far end, landing in a puddle of standing rain water.
Superion landed right next to his enemy.

Bright red blood flowed from the area where Superion had
landed his cataclysmic punch. He shuddered -- Hippo was
not wearing his Titanium helmet.

The woman in the trenchcoat ran down the alley, yelling,
"Jack! Jack!"

Hippo's name was not Jack; it was Eric Brek. The woman
inspected Jack and screamed again. "No!" she cried.

Superion's super ears told him all he needed to know.
Jack was dead.

She turned and said, "We were leaving a costume party at
Mid-Town Comics, you f***in' idiot! You f***in' crushed
his head, you stupid mother...."

Superion flew off before she could finish her final
expletive.