Homage: The Incredible Hulk #300 / The Mighty Thor #421

Title: The Incredible Hulk #300 (interior page)	Title: The Mighty Thor #421
Publisher: Marvel Comics	Publisher: Marvel Comics
Cover date: 1984	Cover date: 1990
Artist: Sal Buscema	Artist: Ron Frenz

Homage: ROM Spaceknight #3 / Mars Attacks TPB

Title: ROM Spaceknight #3	Title: Mars Attacks TPB (interior page)
Publisher: Marvel Comics	Publisher: IDW Publishing
Cover date: 1980	Cover date: 2013
Artist: Frank Miller	Artist: Sal Buscema

Spotted at Blog for Rom fans who aren't dicks.

Homage: The Spectacular Spider-Man #158 / The Amazing Spider-Man #341

Title: The Spectacular Spider-Man #158	Title: The Amazing Spider-Man #341
Publisher: Marvel Comics	Publisher: Marvel Comics
Cover date: 1989	Cover date: 1990
Artist: Sal Buscema	Artist: Erik Larsen

Remake: Amazing Heroes #67 / Secret Wars II #1

Title: Amazing Heroes #67	Title: Secret Wars II #1
Publisher: Fantagraphics	Publisher: Marvel Comics
Cover date: 1985	Cover date: 1985
Artist: Sal Buscema	Artist: John Byrne

To explain this remake, I yield the floor to John Byrne:

"Sal Buscema drew [the Secret Wars II cover] originally, but Shooter found fault with his version and called me in to do a "better one". I took one look at Sal's and drew exactly the same thing, just in my own style."

Later, Fantagraphics used the rejected illustration for the Amazing Heroes cover, which was published one month before Secret Wars II #1.