Feel free to answer with "none" or with the same player (i.e. Jamal Lewis will be this season's Jamal Lewis). Note that I didn't include Brady, Moss, and Peterson, as those sorts of leaps are unlikely to be repeated.
On to the questions:
Who will be this year's version of:
Braylon Edwards/Brandon Marshall (young WR who takes a massive step forward, realizes his potential. and lives up to the hype) ?
Jamal Lewis (veteran RB who surprises with a great season) ?
Jason Witten (TE who takes a big step forward) ?
Roddy White (WR who largely flies under the radar and quietly puts up Top 20 WR numbers) ?
Derrick Mason/Joey Galloway/Bobby Engram (veteran WR's who show they still have a lot left in the tank) ?
Dwayne Bowe (the rare rookie WR who makes a real impact) ?
Marshawn Lynch (rookie RB who puts up strong numbers) ?
Earnest Graham/Ryan Grant (RB who seemingly comes out of nowhere to make a huge impact and win championships for many owners) ?
Derek Anderson (QB cinderella story) ?
Roy Williams (promising young WR who gets drafted as a WR1 in many leagues and takes a step back) ?
Cedric Benson (young RB in a good situation who can't take advantage and ends up being a bust) ?
Santana Moss (veteran WR who ends up disappointing) ?
Vincent Jackson (young WR who owners draft with expectation that they'll break out, but ends up disappointing) ?
On to the questions:
Who will be this year's version of:
Braylon Edwards/Brandon Marshall (young WR who takes a massive step forward, realizes his potential. and lives up to the hype) ?
Jamal Lewis (veteran RB who surprises with a great season) ?
Jason Witten (TE who takes a big step forward) ?
Roddy White (WR who largely flies under the radar and quietly puts up Top 20 WR numbers) ?
Derrick Mason/Joey Galloway/Bobby Engram (veteran WR's who show they still have a lot left in the tank) ?
Dwayne Bowe (the rare rookie WR who makes a real impact) ?
Marshawn Lynch (rookie RB who puts up strong numbers) ?
Earnest Graham/Ryan Grant (RB who seemingly comes out of nowhere to make a huge impact and win championships for many owners) ?
Derek Anderson (QB cinderella story) ?
Roy Williams (promising young WR who gets drafted as a WR1 in many leagues and takes a step back) ?
Cedric Benson (young RB in a good situation who can't take advantage and ends up being a bust) ?
Santana Moss (veteran WR who ends up disappointing) ?
Vincent Jackson (young WR who owners draft with expectation that they'll break out, but ends up disappointing) ?