Manawatu riders Tom Hughes (AFC Motorcycles KTM) and Jesse Donnelly (Precise Print Suzuki) also rate as potential threats in the MX1 class. Nicholls (KTM) and Dobson (Kawasaki) are entered in the MX2 (250cc) class.
Townley has raced at Woodville only a couple of times over the past 10 years because of commitments overseas but he dominated the event last season and he said he was looking forward to being there again.
Woodville is one of the biggest events on the Kiwi calendar and it will be an ideal build-up for Townley before the New Zealand Motocross Championships, which kick off near Timaru on February 10, and then his Australian national series campaign that follows.
Since the stand-alone event was first staged half a century ago, in 1961, the Woodville Motocross has grown to become the jewel in New Zealand's motocross crown and hundreds of riders will battle over the weekend, including minis, juniors, seniors, women and veterans.
The long and illustrious list of previous winners includes 1996 500cc motocross world champion Shayne King, Australian champion Craig Dack, Britain's Greg Hanson, American Willie Surratt and Sweden's Gunnar Lindstrom, to name a few.
But "Townley" is the name tipped to be etched on the trophy again this season.