What if the Multiverse is like a tube of toothpaste? When one end is squeezed it effects every place and every dimension and every particle simultaneously. There are no distances because everything is intrinsically connected. (Bells Theorum, Quantum Entanglement, holographic principle etc..)
The tube is possibly 10 dimensional and the inner and outer surface of the tube is in play. (Kaluza-Klein theory/String Theory/SST/MTheory)
The paste is the quantum foam/strings/branes that fulminate within this tube resonating infinite feed back loops that appear as spontaneous quantum events manifesting universes/fundamental forces/spacetime/matter.
Everything that is and will be is contained in this tube and no observations can be made externally, because to do so would take the observer out of the mix. Maybe that is why all the various theories tend to support some properties affirmed by QM. That could explain why the Higgs comes in at the weight it has
or why all probabilities can happen and still collapse into a measurement or why perhaps, retro-causalitly can exist.
Even why information can not be lost.
The laws of physics could possibly differ from various regions of the tube like a weak gravity in our universe is a strong force in a neighboring universe. Universes existing on the surface of tube can not be ruled out nor additional curled up dimensions but I dont want to think about that.
The tube is most likely self existent and finite but it's contents in infinite flux and infinite stages of form.
Spit balling can be fun.
"You were not there for the beginning. You will not be there for the end. Your knowledge of what is going on can only be superficial and relative" William S. Burroughs