Still, their negotiations would have forced New Zealand Rugby to come up with improved deals, and with the national organisation unable to match the money offered by overseas clubs, a sabbatical is seen as the best solution.
Retallick is currently sidelined with a shoulder injury, but 24-year-old Savea is playing a key part in the Hurricanes' push for their first title this year.
Savea possesses one of the best try-scoring strike rates in world rugby history, having dotted down 30 times in 33 games in the All Black jersey, including crossing the line 11 times last season alone.
Scorer of hat-tricks against Ireland on debut and England at Waikato Stadium, Savea has also crossed twice in a game on seven occasions, and was nominated for the 2014 World Rugby Player of the Year award which was claimed by Retallick.
It is understood that Retallick's All Blacks and Chiefs teammate Liam Messam is considering a similar deal with Japanese club Toshiba.
Young talent
• Brodie Retallick
36 All Blacks tests
1 try
Debut v Ireland, Eden Park, 2012
IRB Player of the Year 2014
• Julian Savea
33 All Blacks tests
30 tries
Debut v Ireland, Eden Park, 2012
IRB Player of the Year nominee 2014.