The first and arguably biggest issue that the next GM will have to tackle is what to do with the 'Core Four'. The group, which is made up of
Auston Matthews,
Mitch Marner,
John Tavares, and
William Nylander, takes up 42% of Toronto's total cap space, and with Matthews and Nylander entering the final year of their deals, the Maple Leafs will have to look at all their options with these four stars.