Cunnington, 18, has spent the last five weeks with North Ballarat in the VFL after overcoming a stress reaction in his right foot, which sidelined him for the best part of two months.
An inside midfielder, he produced a number of high-possession performances at that level ahead of being named as an emergency by the Roos last week.
Greenwood is yet to play a senior game this season because of a broken toe, but has returned strongly with Werribee in the last fortnight.
"He (Greenwood) is fit and available, so we'll make a final decision on that after training," Scott said, adding he would also keep a close eye on Cunnington's performance at Arden Street on Thursday morning.
"He (Cunnington) is renowned for his hardness and aggression and leadership qualities.
"But that's selling him short. He's a very classy player, he's very clean and he's got good skills."
However, the wait in the VFL will continue for experienced defender Daniel Pratt, who is trying to make ground after a stop-start pre-season.
Scott said Pratt, who finished third in North's best and fairest count in 2007, was still an important player when at peak fitness.
"Levi and Ben have now played enough footy for me to consider them available. Pratty's not quite available for senior selection yet," he said.
"As I've said before, when Pratty's playing his best football and is fully fit, he's in our best side. He's getting closer and closer to that, and we'll make a decision on him in the next few weeks."
A player with Pratt's aggression wouldn't be lost against Hawthorn, which Scott expects will offer fierce resistance after its 64-point flogging from Collingwood last weekend.
The Hawks have lost their last three matches, but should regain star forward Lance Franklin (suspension) and premiership midfielder Brad Sewell (collarbone).
"We think they'll have some very good ins, some very good quality players coming back into their side," Scott said.
"They would have been bitterly disappointed with last weekend, so I expect nothing less than a fired-up, aggressive, hard-running Hawthorn.
"We'll be prepared for that and we also understand the significance of playing on Anzac Day. Our guys are keen to get out and atone for the loss last week."
North's spread of big men - Hamish McIntosh, Todd Goldstein and David Hale - presents a clear advantage over Hawthorn and its sole ruckman, Brent Renouf.
But Scott said the onus was primarily on McIntosh, who needed to really assert himself on a contest.
"He's put bits and pieces together within games, but he hasn't done it over four full quarters," he said.
"We've got three 200-plus centimetre players who can all play in the ruck, and they've got one. We expect to get dominance in that area."
Scott highlighted the ruck model at Fremantle, where that side was dictating stoppages even when it wasn't winning the clearance from Aaron Sandilands' hit-out.
