I'm glad to see CN effectively out of the battle. Merging with KCS+CP makes far more sense as they'd each have 'T' shaped railroads that compete more or less equally between all major destinations.
Getting the KCS and its Mexico business is the BIG and perhaps the only reason, in my opinion, why CN wanted an essentially redundant north-south route. I'd expect them to divest as much of the KCS as possible while retaining the Mexico business.
If CP gets the KCS, I'd expect them to do whatever they could to link MSP with KCY so trains from western Canada can go south without detouring through Chicago and buying trackage rights to reach KC.