John Cena will serve as a McValue ambassador as McDonald's launches a value menu at U.S. restaurants nationwide.

McDonald’s new McValue menu is live, featuring a $5 Meal Deal, mix-and-match offers, and app-only exclusives—but customers are split.

Earlier this month, the Chicago-based burger chain teased the return of the legendary McRib, later saying the tangy meal would hit menus Dec. 3. The 520-calorie sandwich -- which hasn't been back ...