04.23.16 by Greg Batgirl sketchcover – Detective Comics #44 Batgirl vs. Hipster Crime! A tribute to the first cover appearance of Batman in Detective Comics #27. Ink, color marker and pencil on sketchcover edition of Detective Comics #44.
11.04.12 by Greg Marvel Sketchcovers Avengers vs. X-Men Summer 2012 group of unique sketch covers, for A vs X issue 1 – Ink and blue pencil tones. Featuring the women of Marvel: Spider-Woman, Rogue, Valkyrie, and Emma Frost. Preliminary stages before final art…
10.21.12 by Greg Marvel Sketchcovers Captain America and Thor – mixed media art on blank variant cover editions Captain America 1 – colored inks, colored pencil Fear Itself 1 – colored inks