LAST season's pulsating preliminary final between Greater Western Sydney and the Western Bulldogs might tip the balance in favour of a twilight Grand Final being played this year.

The Saturday game, played in Sydney, became the second most-watched game (other than a Grand Final) in history as viewers tuned in to see the Bulldogs reach their first Grand Final since 1961.

AFL CEO Gillon McLachlan said the timeslot of that game added to the electric atmosphere at the ground.

"Every part of that was compelling," McLachlan said.

"That twilight nature has not been talked about but it certainly added to it."

The past four Saturday preliminary finals have been played in the twilight timeslot.

The AFL Commission's decision on this year's Grand Final start time will be made before the season starts with momentum growing for a change from the traditional afternoon timeslot to a twilight or night kick-off.

McLachlan said there was plenty to consider and a decision had not yet been made.

The AFL CEO also said the prospect of improved television ratings would not be a significant part of the discussion as to whether to make the change.

"I would never recommend moving [the Grand Final time] for ratings," McLachlan said.

"The priority is the football and the match-day experience and you would only move it if it would improve that."

When asked about a financial incentive from broadcasters to make a change, McLachlan conceded it could influence the AFL's decision but said recent history showed football was the priority when it came to scheduling finals.

"We have demonstrated that by the fact that the broadcast contract leaves the decision with us," McLachlan said.

"My priority always is the football and ensuring the best possible game in the fairest conditions for both teams."