http://www.chicagotribune.com/business/ct-mcdonalds-value-menu-20171204-story.html
Certainly I've seen some of the value items consistently priced at different locations, including $1 coffee or $1 large soft drinks. However, many of the items I see vary a lot. I go to some locations that have "premium" prices. For instance I've seen some places with $2.99 Happy Meals, while the one closest to my place charges over $5 for a hamburger Happy Meal.
Apparently they're going to emphasize a $1/$2/$3 pricing model, although
I suppose that may be different if a franchise owner doesn't want to participate or limits items that are at these price points. For instance I remember back in 2013 I was in Manhattan, where the then "Dollar Menu" items at most McDonald's were something like $1.79 or $2 because of the location.