Daniel Bryan's comeback from neck surgery could be delayed into the early part of 2015.

Just weeks after winning the WWE World Heavyweight title at Wrestlemania XXX, Bryan was forced to undergo an operation on his neck, initially ruling him out for a couple of months.

However, the 33-year-old's rehabilitation hasn't gone to plan, and although there was hope that he could return for the Royal Rumble, he now looks likely to remain sidelined.

According to F4WOnline.com, Bryan could require a second round of surgery after failing to regain strength in his arm.

Bryan's participation at Wrestlemania XXXI could also be in considerable doubt.