With Super Bowl LV in the books and the Tampa Bay Buccaneers crowned champions of the 2020 NFL season, we're now officially onto the 2021 offseason. There's lots to be decided before the next season kicks off, with free agency around the corner and the draft not long afterward, not to mention a potential whirlwind of quarterback activity amid it all. But already we can get a slight sense, or at least begin to forecast, which clubs are likely to be on the upswing -- and the downswing -- in the new year.

Keeping in mind that lots can (and will) change from now until Week 1, here's an early look at five teams poised to make a major leap in 2021:

5. Jacksonville Jaguars

This is the easy one, yes, considering the Jags literally need to win two games in 2021 to improve upon 2020. But there's still a ton of unknowns here, with Urban Meyer making the big leap to the NFL and both sides of the ball set for major overhauls. Jacksonville might not be contending for the postseason in the first year of this experiment, but with Trevor Lawrence likely taking over under center and all kinds of supplementary weapons hopefully on the way, the AFC South's cellar-dweller should be much more fiery.

4. New York Jets

When you only win two games, a major improvement might mean finishing 6-10 or 7-9. But that shouldn't discourage Jets fans. New coach Robert Saleh might've been the cleanest hire of the 2021 cycle considering his rigid adherence to disciplined defense and, more importantly, his passionate player-friendly leadership.