"Anyone who has been part of the All Stars knows what a great event it is," Smith said.
"A large part of the Kangaroos side that won the World Cup were Indigenous All Stars players. We know how much that event means to them and I guarantee it will come back bigger and better."
Smith and Greenberg met with Wigan chairman Ian Lenagan for dinner last week in Bondi before the World Club Challenge between the Sydney Roosters and the Super League champions.
And Lenagan has since stated he's confident of a deal being struck with the NRL for three teams to face off against three Super League sides across a weekend in February - with the premiers from both competitions playing one another on the Sunday.
But Greenberg was more cautious saying discussions needed to take place with clubs and players before anything can be decided.
"It's part of the complex pre-season structure we're having with clubs," he said.
"We'll assess all those opportunities in collaboration with the English clubs."
Smith said the prospect of a varied pre-season program could only be a good thing for the game.
"With the World Club Challenge we had more than 30,000 people, we had the success of the Nines ... it is a good problem to have," he said.
"But it's one we need to think carefully about because we want to manage player welfare and secondly we want to maximise value."