Uninformed indeed :) We know that Newtonian gravity is a low-energy slow-motion approximation of General Relativity, and that a sentence like “total mass of the universe” is meaningless in the spatially flat but expanding universe. While there is a tension between GR and QM, and it has no good explanation for the Tully–Fisher relation, anything that would do a better job would have to be compatible with GR in the regime where it is shown to work well. Consider reading up on the current state of the field before coming up with your own models. Also, reminds me of my very old post.
Uninformed indeed :) We know that Newtonian gravity is a low-energy slow-motion approximation of General Relativity, and that a sentence like “total mass of the universe” is meaningless in the spatially flat but expanding universe. While there is a tension between GR and QM, and it has no good explanation for the Tully–Fisher relation, anything that would do a better job would have to be compatible with GR in the regime where it is shown to work well. Consider reading up on the current state of the field before coming up with your own models. Also, reminds me of my very old post.