Well, that might be a bit premature, since he has not been selected yet. But the South African-born left-armer has been the form bowler in the Plunket Shield for the past two seasons and was among the wickets again.
He took a career-best of seven for 46 to help dismiss Wellington for a paltry 112 on the opening day.
Earlier in the season, he took what was then his best haul of seven for 96 against the same opponent at the Basin Reserve, and last year he became the first player in the history of first-class cricket to take five wickets in one over. The victim - Wellington once again.
His efforts, and those of batsmen Hamish Rutherford and Craig Cumming, have put Otago in a dominant position on 195 for two.
That is a lead of 73 with eight first-innings wickets in hand.
Rutherford worked a ball off his hip to fine leg to raise his third first-class century. The shot was in contrast to the three fours he cracked earlier in the over.
The 22-year-old has shaken his tag as a twenty/20 specialist with a fine run of form since replacing Aaron Redmond in the squad earlier this month.
He scored back-to-back hundreds against Northern Districts and whacked a rapid 67 against Canterbury last week as Otago came within nine runs of a dramatic victory.
He was unbeaten on 101 when bad light ended play. Neil Broom is at the wicket with him on 20.
The retiring Cumming is playing in his 147th and last first-class game and was obviously enjoying the occasion. He looked relaxed at the crease and batted with freedom before he was trapped lbw for 56 - his 44th first-class half-century. He shared in a 131-run stand for the first wicket with Rutherford.
Pace bowler Jacob Duffy (17) also made an impression on his first-class debut. He took a wicket with his 10th ball. He was a little erratic but there is plenty of potential for coach Vaughn Johnson to work with.
But the day belonged to Wagner. His last four wickets came from 10 balls and cost just five runs. He got the ball to swing in and nip about and was backed up with some good catching in the slip cordon.
After a four-year wait, Wagner believes he will become eligible to play for his adopted country on April 2, although there are still "a few things to sort out".
He bought a house in Dunedin in August and has not made any plans for the winter just yet. He would normally go back to South Africa to do some coaching work but is rather hoping he might be otherwise employed playing international cricket.
"It is the thing I've been working for," Wagner said. "It has been a long wait and I've been trying to string enough performances together and, hopefully, I can get a crack."
Another couple of innings against Wellington should eliminate any remaining critics. In seven previous games against the Firebirds, Wagner had taken 39 wickets at an average of 21.23 and yesterday he was too good once again.
Harry Boam top-scored with 32 and Michael Pollard chipped in with 22 on an otherwise forgettable score card for the visitors.
