According to Bethesda, Fallout 4 will receive regular DLCs and also it will have a season pass. Also, mods will be made available on PlayStation 4. The DLCs will be included in the Season Pass for $30, and the first one is expected to be released in early 2016.
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.
Bethesda promised that the DLCs won’t be coming only with fixes, and that more important than this, will be the new features added in accordance with the feedback received from you. There is only a few time left until Fallout 4 will be out, as it will be released on November 10.