This set is based on the Royal Tower pack. Essentially, it's the Royal pack, but with new common, uncommon, and rare towers added, and with the Guild Tower available.
New Towers:
Rooster Tower
Boot Tower
Moon Tower
Sun Tower
Mimic Tower
Rook Tower
This update has been uploaded to the beta branch. If you want to play with the new pack now, right-click on Epic Auto Towers in your Steam library, then select "Properties..." -> "Betas" -> "beta - Beta Branch." In the library, the game will now look like this: