The Last Dance vs. The New Guard

Both Lionel Messi and Cristiano Ronaldo are still in the mix. Can they actually contribute at age 39 and 41, or are they more like "spiritual leaders" now?

Is this the tournament where Kylian Mbappé officially cements himself as the greatest of his generation, or will Erling Haaland (finally on the big stage with Norway) steal the show?