In the upcoming Guardians of the Galaxy movie, it appears there could be an obscure cameo.
Disney and Marvel Studios released the full, credited cast list for Guardians of the Galaxy. The credits didn’t reveal any new information on cameos or spoilers. However, near the end, the credits list Steve Gerber and Val Mayerik, who are the co-creators of Howard the Duck.
This has led to speculation that the Guardians of the Galaxy movie will feature some sort of appearance by Howard the Duck. Nothing is known yet about the nature of the appearance.