Suncorp seems the obvious option, but there are doubts whether the Queensland government could financially support both the nines and the tens, which would held around the same time of year.
There is also a school of thought that the tens would be received more warmly in rugby-mad New Zealand, but it is also the most successful pre-season event Australian rugby has ever had.
"Anything is possible," Carroll told AAP when asked about the Brisbane-Auckland switch, which was first raised last year.
"Every event, you've got to look at is it the right market, the right time, is it structured right?
"The (NRL will) be looking at what market they want to be in and what works for rugby league.
"Suncorp's really attractive to everyone, to be honest.
"It's such a great stadium and for a two-day event its connectivity to Caxton Street ... if you go and try and run one of these events at ANZ Stadium, it doesn't quite work.
"I wouldn't be surprised if the (NRL wants) to come here."
The tens is contracted to stay in Brisbane until 2020.
Crowds similar to last year are expected at Suncorp, with a switch to a day- night schedule made after punters and players alike endured searing heat and humidity.
While stars like Israel Folau have been rested and others like Kurtley Beale ruled out through injury, it is seen as a platform for emerging talents to announce themselves as Jordie Barrett did for the Hurricanes.
"Anyone that was here last year I'm pretty sure would be back, because it was a great event," said Panasonic Wild Knights coach Robbie Deans.
"The format is good. The players really enjoyed it.
"I sincerely hope Queensland tourism and Duco are rewarded because they've put a lot of skin in the game. They deserve that."
