Though the road is a good five to eight years away, NCDOT has a pretty informative webpage up on what is now the missing link of Interstate 485 in Northern Mecklenburg County.
What's of note is the design of the current intersection of I-485 and I-85 near University. The interchange is currently a trumpet; but it will be transformed into a high speed four level stack interchange - similar in design to I-485's interchange with I-77 near the South Carolina line.
Also checkout the design of the Prosperity Church Road interchange with four roundabouts!
Take a look for yourself, NCDOT's Charlotte Outerbelt Page.