According to Scrawl, the Portuguese version of Official PlayStation Magazine has published a promotional advert indicating that a reveal of InFamous 2 will be included in its next issue.
The ad features the eyes of Cole McGrath, lead character from the first game, along with a promised announcement of a "great PlayStation 3 exclusive sequel".
Sony has not yet officially confirmed InFamous 2, but it did recently register a domain name for the game's promotional website.
Last October, voice actor David Sullivan also accidentally announced that he had been recast as McGrath for the sequel.
Published by Sony Computer Entertainment, InFamous went on to sell over one million copies after its release in May 2009.