I’m trying to deliberately oversimplify this here, so let’s see if I can get this right.
The conventional hypothesis is that gravity is the bending of a relatively uniform fabric of space-time in response to mass, like a bowling ball on a trampoline. The problem is that there appears to be more gravitational attraction than mass in the universe, and therefore dark matter is hypothesized.
This new hypothesis suggests that the fabric of space time is nonuniform to begin with, yet still summing to 0, with areas of greater or lesser “base gravity.” Instead of bowling balls on a trampoline it’s more like marbles on a wrinkled bedsheet. I presume this means mass tends to collect in areas of higher gravitational effect.
Is that the gist?
