Personally, I'd say Mad Max Fury Rd is a much more successful movie in terms of its capacity to it re-invent the franchise for modern audience and to stand on its own.
Tron Legacy has impressive visuals and a classic score by Daft Punk, and Disney is really pushing this as a cry of protest to the Matrix fans: "We did it first!" but the movie is lacking - I don't know - an organic sense of urgency & energy, characters have no stake. Jeff Bridges should kick ass, Olivia Wilde is pretty & Hedlund is just lucky.
Blade Runner 2049 will not be a gigantic hit. Look at Villeneuve's resume: he made sombre, serious movies populated with tortured characters.