When looking back at 2015, there is no single superstar or story line which came out of the past 12 months as well as WWE's developmental brand; NXT.
NXT took over WWE and its Universe throughout the course of last year as its talent excelled in many ways and connected with professional wrestling fans on a whole new level.
In complete contrast to WWE's main roster, there was little, if any criticism about NXT during 2015 as the brand simply achieved something few people saw coming previously.
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The branch hit the road throughout the year and took part in its first UK tour, with tickets selling out in such quick succession that it proved just how popular NXT had become globally.
As well as this, the biggest names in NXT such as Kevin Owens, Sami Zayn, Charlotte, Becky Lynch and Sasha Banks all earned their deserved call up to the main WWE roster.
Even with these departures, NXT is still able to prove its worth as it still possesses a whole host of names to this day, such as Finn Balor, Bayley and Baron Corbin, who WWE will certainly have high hopes for in the future.
One NXT superstar who had a mixed year during 2015 however, despite making his main roster debut, was Sami Zayn.
The stage was set for Zayn, who was introduced by Bret Hart to his home town crowd of Montreal during an episode of Monday Night Raw as he emerged as the challenger for John Cena's United States Championship Title.
Unfortunately, however, before he had even entered the ring, the 31-year-old was atop of the steel steps when he threw his arms into the air and suffered a shoulder injury which was to keep him out of action for months.
Certainly not the start to WWE either Zayn or the WWE and NXT Universe would have been hoping for, but his absence only meant that fans were even more excited when he made his return during an NXT recording in London in December of last year.
For followers of both WWE and NXT, those seven months were firmly in the past when Zayn's music hit and he overcame Tye Dillinger, before taking the microphone to express his delight at being back in a professional wrestling ring.
Since his untimely injury, the Canadian has undoubtedly bounced back and is in the best condition possible heading into the new year.
Kicking the year off as a surprise Royal Rumble entrant during the pay-per-view event which takes place on Sunday 24th January, would certainly be the best way for WWE to continue to promote the hype which surrounded Zayn before his injury.
Following this, Zayn will undoubtedly prove to be a versatile character throughout 2016 as he would work extremely well with the likes of fellow previous NXT stars such as Kevin Owens, Tyler Breeze and Adrian Neville.
Alternatively, Zayn would fit in well amongst the current top names on WWE's roster, having already made his mark despite his injury, by challenging the face of the company in his debut match.
WWE have a number of options with Sami Zayn and 2016 is just the start of that, but if they were to allow him to achieve a successful year, the biggest title in the business could well be in his sights in the not-too-distant future.
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