Wood made the comments during an appearance on WJR 760, per Tim Twentyman of the Lions' official website. He did not say whether Johnson plans to accept the invite.
A six-time Pro Bowler and the greatest receiver in Lions history, Johnson retired after the 2015 season. While he maintained for more than a year he was leaving football due to injury concerns, Johnson admitted earlier this month his frustration with the Lions' losing ways played a factor.
"Of course, I thought about it," Johnson said in Italy, per ESPN.com. "Just like in basketball, you know, guys, they create these superteams. But it's not quite like that in football where I had the freedom just to go.
"I was stuck in my contract with Detroit, and they told me, they would not release my contract, so I would have to come back to them. I didn't see the chance for them to win a Super Bowl at the time, and for the work I was putting in, it wasn't worth my time to keep on beating my head against the wall and not going anywhere. It's the definition of insanity."
Johnson was also frustrated by the Lions forcing him to repay part of his signing bonus upon his retirement.
"I don't even like to talk Lions too much just because the way our relationship ended," Johnson told Dave Birkett of the Detroit Free Press when asked if he could see his jersey being retired. "If they see me around here, we'll see. But hey, I don't know.
"I just didn't feel like I was treated the way I should have been treated on the way out. That's all. I mean, it's all good. I'm not tripping. I don't feel any kind of way, just hey, that's what they did. Hey, it is what [it] is."
The Lions forced Johnson to pay back at least $1 million of his signing bonus, per ESPN.com's Michael Rothstein, which they were not required to do. The franchise took a similar approach with Hall of Fame running back Barry Sanders, who harbored resentment toward the Lions for years after they took him to court over bonuses after his retirement.