Despite rumours of a return to rugby league with the Sydney Roosters in the NRL and a brief stint in Japan for the Panasonic club, Williams gave nothing away when asked what his plans are when his current contract with the New Zealand Rugby Union ends but said he hoped to make a statement about his future soon.

"Hopefully, when the time's right," he told Fairfax Media.

"But as long as my coaches and my fellow team-mates are happy with how I'm doing, how I'm putting in, then I'm happy," added Williams.

Chiefs coach Dave Rennie and NZRU chief executive Steve Tew know what Williams' decision is but are not at liberty to reveal it.

Tew explained that he had a "pretty good idea" what Williams was planning to do after 2012.

"We've also given a commitment to him and the Chiefs about when that will be announced," Tew said.

Williams, who was one of the All Blacks' stars during the recent 3-0 series win over Ireland, is happy with his current form.

"A lot of people last year said that I didn't have what it took to make it as an All Black but I always said 'just give me a bit of game time and then we'll see how I go'," Williams said.

"It's been pleasing [in the recent series] to know that I can compete at that level."

Williams has been playing rugby in New Zealand since 2010 and feels that his made tremendous strides in learning the game.

He revealed that there many people who don't realise that there are huge differences between playing union and league.

"Just because they're played on the same pitch people seem to think the games aren't too different but they're totally different games and you only have to ask Brad Thorn about that," explained Williams.