The Hoops made it back-to-back Scottish Premier League titles on the weekend and the Welshman feels there can be plenty more of the same provided Neil Lennon's quality players remain at Parkhead.
"There will always be ins and outs in football at every club. But if we can keep the squad pretty much intact, we can go forward. We have a fantastic team but I'll be very surprised if everyone stays," he told Record Sport.
"Everyone has watched the Champions League and SPL and there's going to be a lot of interest in the majority of the players.
"But if we can keep it together we have a fantastic future and Celtic will go forward and hopefully qualify for the Champions League again.
"If we keep playing the way we are, then anything can happen.
"I think most of the players want to stay but you just never know in football. Anything can happen.
"It would be good to keep this squad together and see what happens."