The major issue at hand is the complexity of fragmented markets...
Both the legal and exchange physical trading aspects can be addressed by consolidating all of the US major exchanges to a singular exchange which the ARCA/NYSE will readily address...
After the US exchanges are far less fragmented..then the acquisition/merger/blending of the world´s major exchanges will take place...
The future exchange will more handily ready the funds for capital needs worldwide...more efficiently/effectively than it does today...
This is the underlying focus of this deal...
The world´s public will want this,,and it is going to happen....
This consolidation is not entirely different from any other major industry consolidation..ie electronic brokerages...etc...