At first, CD-Project was supposed to reveal some info on the DLC's before the game even came out. Un/fortunately, these plans have changed, and we will have to wait before that. All we know so far is that the game will get two story expansions and that the first one will be revealed in March.
Good. We will have the time to finish the main game at least once. Hopefully.
CP2077 comes out on December 10. Lets hope it will be good enough.