Whoa Somehow I missed this thread. Thanks, Meatshield for answering.
If you intend to play with us eventually, you will need the Apex DLC, which contains the Tanoa island plus other assets. You will also need Global Mobilization DLC. If you don't have them, unfortunately, they were just on sale, but I believe the sale is over.
Also, Saturday sessions have been suspended, so only get the launcher pre-set for Monday. And yes, it's a heck load of addons.