You know there is a magical entity known as "google" which will provide you with all the answers you seek.
Its true i sawr it, with the sight.
But im not completely heartless so ill answer your questions.
Survival mode is being reworked to be like New Vegas's survival mode, except it now has more features like, diseases, no fast travel, and you can only save on sleep.
Three DLC's on the way
Automaton is this month-involves making robot companions switching, custom voices, paint jobs, and you can mix and match parts
Wasteland workshop(i think or something like that)-you can make more stuff in your settlements and make your own arena. You can put like deathclaws and raiders in containment units and fight them or make them fight each other.
Then there is far harbor-New expansion that adds a new landmass that is "the largest we have ever created in a DLC" revolves around helping out a city thats having an issue the factions involved are synths, children of the atom, and just the other civilians in the city.
https://bethesda.net/#en/events/game.../2016/02/16/77
https://www.reddit.com/r/fo4/comments/47cc06/fallout_4_survival_mode_full_overview_extracted/
These two links will catch you up on everything.