It all fits into what Wilson calls the "natural evolution" of the Sharks.
They moved their American Hockey League team from Worcester, Massachusetts, to San Jose in 2015-16, allowing them to mentor and evaluate their prospects better.
"We knew that we needed to have younger players that played the game the current way the game is played, with offense, puck possession, speed and all that," Wilson said. "So you know that the inevitable day is coming that you need those players to contribute more. I think we've been very cognizant the last five or six years to get the right type of players that one could complement the team that we had, but again how we want to play.
"A lot of our younger players are not young. They've played in the [Stanley Cup Playoffs]. They've played in the Stanley Cup Final [against the Pittsburgh Penguins in 2016]. They've played a lot of hockey surrounded by really good people. And I think there comes a point that the younger players have to step up and take ownership of more of the team."
Marleau, 38, is the leading scorer in Sharks history with 1,082 points (508 goals, 574 assists). He had 46 points (27 goals, 19 assists) last season.
The Sharks have filled that void internally. Forwards Joonas Donskoi, 25; Tomas Hertl, 24; Chris Tierney, 23; and Timo Meier, 21, combined for 16 goals through 50 games last season. They have combined for 47 through 50 games this season.