For the first time in 24 years, the players and management - with the exception of one - will regroup on October 11 for what may be their last get-together.
A black-tie dinner for 750 people at the Ellerslie racecourse in Auckland will also act as a fundraiser for a scholarship in memory of the late All Black prop John Drake.
Drake died suddenly in December 2008. The scholarship is awarded annually to an outstanding school-leaver enrolling at the University of Auckland.
A former selector and RWC 1995 campaign manager, Sir Brian was "pretty comfortable" with the All Black squad.
"The bit I'm impressed about is that for a few players, this will be their third World Cup and they're boosted by what I think are some very, very promising young guys who have had a bit of All Black experience.
"You always live in hope, I guess," he said but "you need to have the experience, to have the right people in the right places".