Black Oyster
Bubinga
Djentleman
Extreme
Grungy
Jazzy
Plexi
Reference
Rock Custom
Studio
As on this page: https://www.ikmultimedia.com/products/ts3/index.php?p=versions#compare
The content of a bundle is fixed when the bundle is first released, Newer sounds or gear are not added, But you will get updates to the software, so you can update MODO Drum to v1.5.
Now, looking at the Release Notes, the reference to "Added 3 new kits: Silver, Brit Custom and Metal." is. in my view. misleading (and I have raised the use of similar statements with IKM Sales in the past, it should say something like "includes support for 3 new kits...."). As I understand it, if you buy MODO Drum 1.5 you would get all 13 kits. But if you have MODO Drum 1.0 you can update the software to v1.5 (and onwards) but would not get the 3 new kits.
I will guess that Total Studio 4 MAX (if it does become a product) will include MODO Drum 1.5.