Sadler is leaving Richard Childress Racing after finishing second in points the past two seasons. There was speculation he might drive a part-time Sprint Cup schedule for JGR, but Gibbs said that was not in the plans.
Sadler said his ultimate goal is to get back to the Sprint Cup Series and admitted while there are no guarantees, JGR has said if he performs well other opportunities could open up.
JGR has made it no secret that adding a fourth Cup team at some point is in the organization's plans.
"I really feel like the opportunity over there will be good," Sadler said at the Nationwide banquet. "I want another shot at winning Cup races, of being a part of the Chase."
Sadler said he wasn't looking to leave RCR, but there wasn't a ride for him.
"Why wouldn't I want to stay," Sadler said. "Of course I wanted to stay."
Sadler said he didn't know what number he would drive, but was hopeful OneMain Financial would move with him from RCR.
Kyle Busch reduced his time in the Truck and Nationwide Series this past season in an effort to focus on Cup. He finished 13th in points and missed the Chase.
"With Kyle not filling his time in Nationwide racing, that probably caused him more distractions than doing it," Gibbs said prior to the Nationwide Series banquet in which JGR won the owner's title with the No. 18. "Kyle, he's kind of motivated being around the sport. He races Late Models and is a great ambassador for NASCAR."
Gibbs said Busch would split a Nationwide car with several young drivers such as Drew Herring and Darrell Wallace Jr. He said plans also are being put in place for Wallace to drive a Truck Series team for Kyle Busch Motorsports.
Brian Vickers will join Sadler in driving a full-time Nationwide ride for the championship. Vickers also will drive a part-time Cup schedule for Michael Waltrip Racing in the No. 55 he will share with Mark Martin and team owner Michael Waltrip.
Gibbs said he was unsure which numbers would be assigned to which drivers at this point.