The 62-year-old Rennie has returned to New Zealand after coaching Japanese side Kobe, replacing Scott Robertson as All Blacks coach just over a year before the Rugby World Cup.Four debutants were named in Rennie's first 34-man New Zealand squad. Three are from newly crowned Super Rugby champions Wellington Hurricanes -- prop Xavier Numia, plus wings Josh Moorby and Fehi Fineanganofo.Auckland Blues flanker Anton Segner is the other new face, with Rennie praising the "outstanding seasons" of all four players.Savea replaced long-term injury victim Scott Barrett as captain and will continue to lead the side when Barrett returns from back surgery."With Ardie, in his Pasifika way, he tried to bat it off a bit and said, whatever you decide, I'll support. If you want to go with someone else, I'll get behind that person," Rennie told reporters of his captaincy conversation with Savea. "What we know with Ardie, he's not a massive talker, but he'll lead through his actions. "Having him as captain, he has massive respect. Very experienced. We think it's best for the team, and I think he'll only get better."Super Rugby this season has seen teams succeed by holding onto the ball more with less tactical kicking.Rennie said his All Blacks team will look to play "optimistic" rugby.'We want to play'"There's a real brutality in the game required, whether you're carrying or whether you're defending," Rennie said. "We'll kick, but we'll kick smart and have a balance to our game. You can't just keep everything in hand because you become too easy to defend.