McFadden has made it clear he is seeking a more experienced off-sider to balance his own relative inexperience.
"I'm hoping we'll be able to make an announcement in the near future," he told the Warriors website on Sunday. "I'm a fairly inexperienced coach at this level and I recognised during the season that I need the support and advice of people who have been around coaching at the top level longer than I have been."
Ironically, Kidwell could find himself in a similar situation to McFadden, who was appointed Kiwis assistant coach in March while serving as assistant to former Warriors coach Matt Elliott. Just five weeks later McFadden stood down from the national post when Elliott's controversial departure saw him appointed head coach of the club.
Iro, who was unavailable for comment, has a strong resume, having previously served at the Warriors in a variety of coaching roles between 2005-12, and also having worked as national assistant to Kearney between 2009-13. He moved into the Kiwis football manager role ahead of the 2013 World Cup with former Warriors head coach Ivan Cleary filling the assistant position for that tournament.
Payten has a strong connection with McFadden from their time playing together at Canberra between 1997 and 2001 and previously coached the Tigers Under 20s side to grand final success in 2012.
Kidwell, a former Junior Kiwis coach, joined the Tigers staff this year after three years with the Melbourne Storm.