Warren Gatland suggested in the wake of his side's 12-6 defeat at Twickenham that he would seek clarity over the call, and his feedback, as well as that from England counterpart Eddie Jones, will feed into the process.
Wales coach Warren Gatland said Newman, a fellow New Zealander, had made a "terrible mistake" and that view was backed by World Rugby who said the visitors should have had a try on "as the Wales player grounded the ball".
The debate has raged on about whether Anscombe was robbed of his moment, but backs coach Rob Howley has now confirmed that the TMO made an error.
But Wales coach Warren Gatland claimed Newman made "a bad mistake" and most television pundits, including former England players and coaches, felt the Kiwi TMO got it wrong.
"It's happened. It's disappointing that it happens in professional sport but we focus on the next two weeks and getting ourselves ready for Ireland".
After the game he attacked the media for their treatment of Mike Brown, and now he has set his sights on World Rugby after they admitted Gareth Anscombe's disallowed try should have been given.
GETTY IMAGES Warren Gatland will be a happier man if three British and Irish Lions stars return for Wales' next Six Nations match
"There was plenty of time after that decision".
"We obviously had a couple of opportunities that we should have taken". England coach Eddie Jones questioned the point of the admission because, in retrospect, it can't change anything. Sometimes you get the rub of the green, sometimes you don't. You've just got to back the individual to use the replays and communicate well with the touch judges and the referee, then hopefully they get the majority of them right. We've got to trust the referees, respect their integrity.
"A lot of our players are familiar with the Irish players, and we will go there with a great chance of putting them under pressure".
"He has not made a commitment saying I will only play for England, I am sure he is still working it out in his head".
England, bidding to become the first side to win three successive outright Six Nations Championships, continue their title defence when they face oldest rivals Scotland at Edinburgh's Murrayfield ground on February 24.
Nathan Hughes was present at number eight following his recovery from a knee injury ahead of his likely recall for the clash with Scotland on Saturday week. "England's kicking game was outstanding and we expect no different in Ireland", Howley said.