How long will each match be at WrestleMania 34?

#11: John Cena vs. The Undertaker (~16 minutes)

How good of a spectacle will it be?

The model to use here is The Rock vs. Hulk Hogan at WrestleMania 18. This match won't be about work rate but seeing two icons square off in the ring. 15 minutes is more than enough time to do that and hide Undertaker's weaknesses. Taunts and facial expressions will likely do more than moves in getting this match over. It should last just long enough to satisfy fans while leaving before the work rate weaknesses express themselves.