XD84 on 31 October 2018
I think Nintendo never allocated altogether so much presentation time for one video game before:
Direct March 2018: 1 minute
e3 2018: 25 minutes
Direct August 2018: 27 minutes
Direct September 2018: 3 minutes
Upcoming Direct November 2018: 40 minutes
Totaled up Smash aired on Nintendo presentation (excluding Treehouses): 96 minutes
