http://www.eurogamer.net/articles/2015-09-09-fallout-4s-big-season-pass-promise
Bethesda has said the Fallout 4 Season Pass will cost $30 (around £20) and those who buy it will get all of the Fallout 4 DLC the developer ever creates.
In a post on Bethesda.net, the developer said the first Fallout 4 DLC will come out early 2016, following the game's November 2015 launch.
"We've always done a lot of DLC for our games," Bethesda said.
"We love making them and you always ask us for more. To reward our most loyal fans, this time we'll be offering a Season Pass that will get you all of the Fallout 4 DLC we ever do for just $30.
"Since we're still hard at work on the game, we don't know what the actual DLC will be yet, but it will start coming early next year. Based on what we did for Oblivion, Fallout 3, and Skyrim, we know that it will be worth at least $40, and if we do more, you'll get it all with the Season Pass.