It won't. The South Africa-born left-armer will have to wait at least another year before he is eligible but, based on recent form, he would certainly add some sting to the Black Caps' arsenal.
The 24-year-old is fresh from a 10-wicket haul - his maiden first-class 10-wicket bag - which helped Otago register a six-wicket win against Auckland at Colin Maiden Park yesterday. And last week he captured six Northern Districts' wickets in a drawn fixture at the Queenstown Events Centre.
So far, he has taken 16 wickets at an average of 11.56 and is on track for his best summer. But any thoughts of playing international cricket will have to be put on ice - for now.
Despite playing for New Zealand A and the New Zealand emerging players side during the past two winters, Wagner says he will not be eligible to play for his adopted country until January 2012 - a year longer than he was led to believe when he left his homeland to join Otago in the spring of 2008.
"I've had some clarification but it is still not a 100% sure yet," Wagner said when asked how long it would be before he was eligible.
"This coming January I've got one more year left, so it is about 13 months away."
Wagner believed he would need to live and play cricket in New Zealand for three years before he would qualify for the Black Caps. And everybody, except the ICC, the game's governing body, was on the same page.
"When I came over I was told three years. That was the word through New Zealand Cricket, through my agent and through Otago cricket. That was the time that was mentioned at the start, but the ICC are quite strict on these things and have their own policies."
Otago Cricket Association (OCA) chief executive Ross Dykes said yesterday, after seeking clarification from NZ Cricket, Wagner would not become eligible for the Black Caps until the end of the 2012 season - not January 2011.
The ICC's eligibility rules are clear: a player must live and play in the country for four years, not three. And it is not a new policy either. Somehow, NZ Cricket, the OCA and Wagner's agent were all under the wrong impression.
It is a blunder which Wagner has had to take in his stride.
"It is just one of those things which I can't control, so I try not to think about it too much," he said.
"If it turns out that I qualify earlier, rather than later, then I just want to make sure that I'm ready.
"If I can put some consistent performances together then, hopefully, when that times comes, they'll be looking at selecting me. All I can do is keep doing what I'm doing and hope for the best from there."
One thing is for sure - if Wagner keeps bowling as well as has over the past few weeks, he will eventually play international cricket.
Wagner was a crucial figure in Otago's six-wicket win. He took four for 60 to help restrict Auckland to 298 in its first innings, then added a valuable 41 with the bat to help his side recover from 51 for five to reach 292.
But it was his superb spell in Auckland's second innings which made the difference. He removed Jeet Raval and Bradley Cachopa late on day two, then exploited some humid conditions early on day three to undo Andrew de Boorder, former Otago batsman Greg Todd and the dangerous Colin de Grandhomme.
He added the scalp of Andre Adams to finish with six for 50, his best first-class return and his sixth five-wicket bag. Chasing 197 for victory, Otago cruised to a comfortable win. Aaron Redmond made 55 at the top and Neil Broom compiled an undefeated 50.
