Joey Barton continues to be linked with a move to Rangers, with boss Mark Warburton telling SkySports last week he wants to sign the midfielder.
The outspoken 33-year-old would come up against new Celtic boss Brendan Rodgers, a manager for who he had choice words for in the past.
Rodgers came close to winning the Premier League title with Liverpool in 2013/14, but Barton believes he was fortunate to get so close, inheriting a squad led by Luis Suarez.
He told The Star in 2014: "Brendan has to take the responsibility as the manager because he had a lot of input into transfers but has come up short.
"The reality is he will get time after the freak season they had last season - and make no mistake it was a freak season, with having no midweek commitments and one of the best players in the world at the top of his game.
"But how can you sell Luis Suarez and replace him with Mario Balotelli?"
Rodgers was fired by Liverpool less than a year later, and is now embarking on his first management role since his Anfield exit, taking on the Celtic job.
He was a much maligned coach over his final few months in charge of Liverpool, with analysts like Barton queuing up to take pot shots at him.
This should have only resolved Rodgers' steel to succeed with Celtic, potentially at Barton and Rangers' expense.