The Bastion DLC that expands on the back story of the game's mysterious narrator and unlocks two new modes will be the only and last planned DLC for the XBLA and PC game, according to Supergiant Games' creative director, Greg Kasavin.
Over the weekend, when asked whether Bastion will be receiving more DLC after Stranger's Dream, Kasavin said "no". He said he wasn't certain if this was the end of Bastion, but that they had no further plans for the game at this point.
Stranger's Dream, will be available in December 14 and will be free for PC and cost 80 Microsoft Points on XBLA. Due to Microsoft policy, Supergiant Games were not able to offer the DLC on XBLA for free.