They wont share the square.
Whoever starts their game first, gets the square, with priority going to the team playing at home
Last year, game 2 Leafs @ Caps was on Saturday night while the Raps played home game earlier that afternoon.
There was an overlap of about an hour between the end of the ball game and puck drop, where both games were on.
The Raps got the square, Leaf fans were already watching wherever, and once the Raps game was over the Leaf game was switched on, but no one was there to watch az it was mid-game already