So many marquee names. So much money for teams to spend. This Sunday, starting at 6 p.m. Eastern Time, the N.B.A. could witness one of the wildest off-seasons in league history.

The Los Angeles Lakers and the Los Angeles Clippers are trying to lure Kawhi Leonard out of Canada after he just led the Toronto Raptors to the championship. Kevin Durant is considering the Knicks and the Nets, as well as the Clippers, along with a return to the Golden State Warriors.

Boston’s Kyrie Irving, Charlotte’s Kemba Walker, Philadelphia’s Jimmy Butler and Milwaukee’s Khris Middleton join Leonard, plus the injured but still deeply coveted duo of Durant and Klay Thompson from the Warriors, as the headliners in a deep free-agent class. It’s a lot to track — especially with nine teams expected to have at least $30 million in salary-cap space and roughly 200 other free agents in a league that offers only 450 full-time jobs.

The forecast for considerable movement is promising, given the go-for-it sentiment that has infected numerous front offices. The league’s sudden lack of a clear-cut favorite for the first time since Golden State’s championship run began in 2015 — provided Leonard decides not to return to Toronto — invites daring and deal-making.