Hey everyone. I am seeing a few different threads where people who are upgrading their current accounts to the Elsweyr Chapter are getting Morrowind and Summeret and I wanted to help clarify you are not.
If you DO NOT own the game, and are making a new account, the Standard Elsweyr and Elsweyr Digital Collectors Addition DO come with Morrowind and Summerset, but only if you pre purchase.
If you
are currently playing ESO, and
have a ESO account, you will be purchasing one of the UPGRADES. The
Upgrades do NOT come with Morrowind and Summerset.

Here is the article where you can read about each version of the game and what each includes:
https://www.elderscrollsonline.com/en-us/news/post/55537
Here is a picture showing you a comparison of each of the versions:

The Bundled base game packages are there to help newer players get into the game easier, and have all previous expansions without having to look them all up and add them separately.
I just wanted to help clarify any confusion out there.