The idea is not a Dark Tower game. The idea is inspired by the Dark Tower series. In the series of books Roland
(Drawing of the Three).
(Wizard and Glass),
(Wizard and Glass),
(Wizard and Glass),
(Wolves of the Calla), and even
(The Wastelands).
The inside cover shows that the series is linked to
and that's just the ones written by him.
and basically all these worlds end up intersecting. Which is the basis of the idea I think would be awesome. A ton of different fantasy worlds intersect as the walls of reality begin to fall apart.