Brendan Rodgers remains the bookies favourites to become Celtic boss, listed at 1/4 with bookies SkyBet.
His task will be not only to progress in the Champions League, but keep a resurgent Rangers at bay domestically.
The Gers will have a few familiar faces for Rodgers, not only manager Mark Warburton with who he worked at Watford, but also Jordan Rossiter, recently signed from Liverpool, where he gave him a debut.
Another Rangers player who Rodgers handed his big break was Rob Kiernan, who came through the Watford academy, overseen by Warburton at the time.
Rodgers clearly approved of Warburton's work with Kiernan, calling him up to train with the first team squad during his season in charge of the Hornets in 2008/09.
Kiernan was handed his first team debut under Rodgers in an FA Cup win over Crystal Palace, but his progress stalled after the Northern Irishman left the club for Reading at the end of the season.
The defender went back to playing under-21 football and was sent out on a series of loan moves, and left on a free transfer for Wigan Athetic in 2011.
Mark Warburton brought him back to Rangers last season, where he has featured regularly, making 44 appearances for the club.
His career could have panned out differently had Rodgers remained in charge at Watford, and next season Kiernan could go onto haunt his former manager.
Do you think Kiernan will play a big role at Rangers next season?