According to F4WOnline (via wreslinginc.com), Vince McMahon is the force behind Fandango's push:
Fandango is getting a spot on WrestleMania 29 because the character is Vince McMahon's new pet project. Vince is said to be a big fan of the gimmick and the arrogance that comes with it. The idea at WrestleMania 29 is for Chris Jericho to make the Fandango character stronger. Vince is really behind the success of Fandango.
So what does this mean for Fandango?
Well, a WrestleMania win against Y2J seems likely but that may only be the beginning.
Another gimmick said to be a "pet project" of Vince McMahon is the extreme right-wing characterization of Zeb Colter and Jack Swagger.
Vince's interest in the success of that duo has propelled Swagger into a world championship match at WrestleMania.
Will Fandango reach similar heights?
He's certainly off to a strong start. His debut match is at WrestleMania against the legendary Chris Jericho.
Y2J puts over young stars quite a lot nowadays, but still, a victory over him will do wonders for Johnny Curtis’ career progression.
Speaking of Jericho, according to the same report, WrestleMania may not be the last we see of the multi-talented superstar this year.
Regarding Jericho's WWE status, the two sides are talking about what he will be doing with them in the future. He was originally scheduled to finish up at WrestleMania. The belief within WWE is that Jericho and WWE will continue to have a part-time relationship.
Jericho is expected to take time off after 'Mania to tour with his band Fozzy until at least the end of April, but his WWE future is unknown after that.
If this report is true, it seems probable that we'll see Jericho return for SummerSlam or Survivor Series programs.