With nine new players (so far) joining the Toronto Maple Leafs next season, we have a lot to dig into in the latest offseason depth chart.Let’s get right to it.ForwardsLineLWCRW1McKennaMatthewsNylander2KniesTavaresRoslovic3CowanPaulSissons4JoshuaBluegerDuhaimeExtraLorentzDomiFor the second year in a row, who plays with Auston Matthews will be one of the central questions heading into training camp.There isn’t one surefire option like there used to be when you-know-who was still around. But there are at least five candidates of varying intrigue for the two flanks. (Nick Paul could be a long-shot sixth option.)Gavin McKenna: This is going to happen — at some point.As predicted, Gavin McKenna goes No. 1The Athletic Hockey ShowMcKenna said it was a “goal” to play with Matthews next season. Their contrasting skill sets — McKenna the passer, Matthews the shooter — make it easy to see why this might not just work but be a truly special connection.Matthews didn’t have a playmaker of McKenna’s ability last season and suffered for it.The most immediate question is whether new Leafs coach Jim Hiller wants to drop McKenna into primetime with Matthews straight away.Not only is the pressure on McKenna going to be immense, but the Matthews line will face real dudes every night — Nikita Kucherov, Aleksander Barkov, Zach Werenski, Cale Makar, the best opponents have.It’s a lot to ask any rookie to tangle with that kind of competition night after night, let alone as a 170-pound, 18-year-old rookie.Hiller could opt to ease McKenna in by playing him lower in the lineup in the early going.Matthew Knies: Nobody played more with Matthews over the last three seasons than Knies.Something was off with the connection last season, though.Maybe it was the lack of an impact playmaker on the line (a void that McKenna could obviously fill). Maybe it was Knies’ injuries. Maybe it was a Craig Berube-related systemic issue. Maybe it was all of the above.One good reason to give it another go: As Hiller knows from his first stint with the Leafs, Matthews needs a puck-chaser by his side and Knies is maybe the only guy (other than perhaps Easton Cowan) equipped for the role.Knies did play a bit of right wing last season too, so Hiller could stick McKenna on the left and Knies on the right.Another thing to consider: Knies has been much less effective, for perhaps obvious reasons, when he doesn’t play with Matthews.Is Knies for sure sticking around?Will Matthew Knies and Auston Matthews be linemates again next season? (Dan Hamilton / Imagn Images)Jack Roslovic: I don’t know how much it actually matters that Roslovic played on the same line as Matthews over a decade ago with the U.S. National Development Team — that line was rounded out by Matthew Tkachuk — but it probably can’t be totally discounted either.The fit doesn’t look amazing on paper.Not unlike Max Domi in recent years, Roslovic’s defensive limitations could be exposed in top-line waters. (He logged only 132 minutes with Connor McDavid last season.) And unlike Domi, Roslovic is more shooter than passer. The Leafs can balance that out with McKenna, but then how does a McKenna-Matthews-Roslovic combo survive defensively?One thing working in Roslovic’s favour: He’s a right shot, and the Leafs seem to think adding that element to Matthews’ line could be beneficial. The captain’s three most frequent linemates last season were lefties.William Nylander: The simplest answer to this question might just be the right one: Nylander, the best winger on the team.Does playing Matthews and Nylander together make the Leafs too top-heavy? It might, especially if McKenna is there too.This top six looks solid enough though, more so if Knies and Cowan continue to grow:McKenna – Matthews – Nylander