Leonardo DiCaprio: Inception and Viking movie with Mel Gibson

"Mel Gibson will direct and Leonardo DiCaprio will star in an untitled period drama set in the world of Viking culture. William Monahan is writing the script.

Graham King will produce with Gibson and Tim Headington in a co-production between King’s GK Films and Gibson’s Icon Productions. Shooting is expected to begin fall, 2010, meaning that if everything falls into place, it would be the next directing effort for Gibson.
The principals confirmed the project but would not divulge many details. DiCaprio, who has long been fascinated by Viking culture, will play one in a storyline that will be as unsparing as Gibson’s other period directing efforts “Braveheart”, “The Passion of the Christ” and “Apocalypto.”

The connective tissue is King.
Leonardo DiCaprio plays Billy Costigan in "The Departed" (2006).

The producer teamed with DiCaprio and Monahan in the Oscar-winning drama “The Departed”, and just worked with Gibson and Monahan in the Martin Campbell-directed drama “Edge of Darkness.”
Leonardo DiCaprio with Christopher Nolan and Ellen Page filming a scene for 'Inception' in Los Angeles, on 19 October, 2009 - Photos by Photo Agency.

DiCaprio will likely take a film before putting on the Viking horns. He just completed the Christopher Nolan-directed “Inception” for Warner Bros., and will next be seen in the Martin Scorsese-directed “Shutter Island”, which Paramount releases February 19. Gibson just completed the Jodie Foster-directed “The Beaver.”
Source: weblogs.variety.com