Which will never happen. Muzzin is literally one of the most dominant Defenders in the entire league. that's like saying, Forbort is the next Doughty.
Forbort is the next Doughty?! Cool. I mean, he's only played 13 NHL games...
Seriously, lighten up. I get how good Muzzin is. I've said as much defending him on the main board. The point in comparing Muzzin and McNabb is that they both struggled early in their careers before figuring it all out. That doesn't mean that they will both be equivalent, but sometimes it takes a few years for guys to find their stride. Muzzin sucked ass in his first season, and has had plenty of struggles since. He was also carried by Doughty for a while, and there's no way he could anchor the second pair in his second season, just like McNabb.