From the first steps micro black holes to filaments of density the first prediction that can be made is this:-

The force of attraction in our galaxy is between us and the great attractor arm only.
That is take the two spiral arms, straighten them out and measure against each other.
Where there is a density of stars on one side over the other should be a kink in the arm.

I have a ten digit calculator and so won't be attempting this.
It would be a simple program to run given the knowledge and position of the stars in our galaxy.
This would prove gravity density.

The greater density is that of the universe in a closed finite structure that holds the filament open.
This means a finite closed system in an open unbounded space.
This also means time is variable.
This means we are well past the halfway point of a collapsing universe.

The good news is the final collapse is nowhere near for us in our timeframe or for our children.
The bad news is we are about to go on a rollercoaster ride and should strap in for it.

Perhaps it is worth looking at for anyone with access to the right program.

Cheers Mike