The base game will continue to receive updates. The Isle of Siptah DLC will receive updates from the base game, as well as updates to flesh out its map and squash nasty insects.
You can find the patch notes for the base game update here:
The base game update will come to consoles , possibly pending release of a couple of hotfixes - the first of which is currently in certification.
, possibly pending release of a couple of hotfixes - the first of which is currently in certification.