Balancing and graphical quality present obstacle
Adding them all would have led to a delay, director Masuda explains
Nintendo details show floor plans
New gameplay details also revealed, including four-player online raids
Adventure Sync will still count players' steps, though.
Plus new mobile titles including sleep app
15-minute presentation scheduled for June 5
Breaks Tomb Raider’s North American opening weekend record
Mario Run developer to release new title before April 2020
Online broadcast set for Tuesday June 11, will focus "entirely on software"