Homage: Justice League #21 / Forever Evil #7

Title: Justice League #21	Title: Forever Evil #7
Publisher: DC Comics	Publisher: DC Comics
Cover date: 2013	Cover date: 2014
Artist: Gary Frank	Artist: Gary Frank

Remake: Action Comics #27 / Superman Unchained #2

Title: Action Comics #27	Title: Superman Unchained #2
Publisher: DC Comics	Publisher: DC Comics
Cover date: 1940	Cover date: 2013
Artist: Paul Cassidy	Artist: Gary Frank

Spotted at Comic Book Resources.

Related: Supergirl v4 #11 / Supergirl v4 #12

Title: Supergirl v4 #11	Title: Supergirl v4 #12
Publisher: DC Comics	Publisher: DC Comics
Cover date: 1997	Cover date: 1997
Artist: Gary Frank	Artist: Gary Frank

Homage: Superman: World of New Krypton #1-12

Title: Superman: World of New Krypton #1	Title: Superman: World of New Krypton #12
Publisher: DC Comics	Publisher: DC Comics
Cover date: 2009	Cover date: 2010
Artist: Gary Frank	Artist: Gary Frank

One Moment in Time: The Uncanny X-Men #201 / X-Men Classic #105

Title: The Uncanny X-Men #201	Title: X-Men Classic #105
Publisher: Marvel Comics	Publisher: Marvel Comics
Cover date: 1986	Cover date: 1995
Artist: Rick Leonardi	Artist: Gary Frank

Homage: T.H.U.N.D.E.R. Agents v1 #18 / T.H.U.N.D.E.R. Agents v3 #2

Title: T.H.U.N.D.E.R. Agents v1 #18	Title: T.H.U.N.D.E.R. Agents v3 #2
Publisher: Tower Comics	Publisher: DC Comics
Cover date: 1966	Cover date: 2011
Artist: Wally Wood	Artist: Gary Frank

Squadron Supreme v1 TPB / Squadron Supreme v3 #1

Title: Squadron Supreme v1 TPB	Title: Squadron Supreme v3 #1
Publisher: Marvel Comics	Publisher: Marvel Comics
Cover date: 2005	Cover date: 2006
Artist: Alex Ross	Artist: Gary Frank

Before and After: Action Comics #869

Title: Action Comics #869 Solicitation	Title: Action Comics #869
Publisher: DC Comics	Publisher: DC Comics
Cover date: 2008	Cover date: 2008
Artist: Gary Frank	Artist: Gary Frank