I guess Dracula Untold being the launching pad is being downplayed and The Mummy will be the true start of the shared universe.
So the real movie list is:
The Mummy (2017)
Untitled Invisible Man film (TBA)
Untitled Wolf Man film (TBA)
Untitled Van Helsing film (TBA)
Untitled Creature from the Black Lagoon film (TBA)
Untitled Bride of Frankenstein film (TBA) with no standalone Frankenstein's monster film.
Sofia Boutella, Russell Crowe , Javier Bardem, Johnny Depp are all still attached.
http://collider.com/van-helsing-remake/