Last season, there was a cloud of uncertainty amidst a time of change at Celtic.
A largely-unknown Norwegian, Ronny Deila, had just taken over at the helm from Neil Lennon, who had helped the club to three successive league titles and steered Celtic into the last 16 of the Champions League in his time at the club.
Deila promised attractive, attacking football and his ideas seemed too good to be true heading towards Christmas, with the team performing below standards having been knocked out, effectively twice, in the Champions League before the group stage and had been underwhelming in the league campaign to that point.
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However, just three months on things were a lot more promising; Celtic had secured the League Cup without conceding a single goal on the way, a semi-final place had been secured in the Scottish Cup and the side had lost just twice in 2015 - including the 1-0 away loss to Inter Milan in the Europa League.
Deila had won over the fans, including those asking for his dismissal early into his Celtic career, and the Norwegian soon proved that he was not out of his depth at the club.
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This season, there is a lot more optimism in the air as Celtic fans look forward to a hopefully more-successful European campaign, with the group stage of the Champions League a bare-minimum target for the Scottish side.
Europe’s top competition is absolutely vital for the fans, the squad and the board; the fans get to see the Bhoys face off with the likes of Barcelona, the squad will get to test themselves more thoroughly against top opposition, and the board will be able to utilise more funds as the financial rewards of the Champions League are too lucrative to miss out.
With regards to domestic competition, the Celtic fans were dreaming of a domestic Treble until April, when the Hoops were knocked out of the Scottish Cup by Inverness.
This season, the fans will be hoping for better as the side go into the league campaign on the back of a great end to the last; a better start in the Premiership this season should mean that they can focus more on the Cup competitions.
Of course, without Rangers in the league, Celtic are expected to win at a canter, and, although many feel it is expected, it will be difficult for the Bhoys to go an entire league season unbeaten, the minimum aim should be to finish the season with an unbeaten home record and secure a fifth successive Scottish Premiership title.