"There are some restrictions around field usage that were given to the Cricket World Cup authorities three or four years ago when they secured the ground. Once February 1 comes around there is a two-month window where no one can use Eden Park. The only available weekend will be the last week of January 30-31," Lonergan said.
Auckland Anniversary is the previous Monday which would leave the weekend of January 24-25 as an option. However, teams might not be keen on an even earlier date.
The first Cricket World Cup game at Eden Park isn't until February 28 when the Black Caps face Australia in a pool match.
"The NRL will be the ultimate arbitrator to which date it is played. We'd be very happy with that date. The weather was a contributing factor over the last couple of days and January 30-31 the weather's at its very best," Lonergan said.
"Feedback from the players and the captains and coaches, end of the day they're the ones that get out there and play the game and we have to make sure they're happy with it."
NRL CEO Dave Smith said he's open to new ideas around the tournament, such as expansion, when they sit down with Duco.
New Warriors recruit Sam Tomkins is keen on Super League teams being part of the event saying there is room for a couple of teams.
"I don't see why they shouldn't. There's enough room for another two teams in this. Wigan would be perfect. Whether it would be to an English side or a guest side, it would attract more fans."
Warriors Nines coach Ricky Henry was also open to changes and even the possible inclusion of rugby players.
"We have seen Brad Fittler and Steve Menzies come out of retirement so you might see some other guys come out and play the competition. You never know. There might be opportunities where you see All Blacks and Wallabies playing in it as well. Anything can happen."