Joe Webber returns for his 26th tournament for New Zealand, and first since the Rio Olympics. Lewis Ormond and Teddy Stanaway come back in as the 13th and 14th men.
"We picked up a few injuries in Hong Kong but the good thing is we had a few guys already in Hong Kong playing in the 10s event who are now able to come into the sevens team,' says coach Scott Waldrom.
"It is great to welcome back experienced players like Joe, Teddy and Lewis who have previously played for New Zealand. And it's great to have Tone (Ng Shiu) back again, as he has been in our environment all year.
"Our focus for Singapore is bringing a new level of consistency. We came close against series leaders Fiji and South Africa in Hong Kong and we beat England. There were some encouraging moments in Hong Kong that we want to repeat this weekend but we know we must beat all these teams to take out a tournament."
The event will be played under the roof at the Singapore National Stadium, and Waldrom says it is much cooler inside than it is outside where the humidity is stifling.
South Africa still lead the World Series standings by 23 points and could just about wrap up the overall title with a fifth Cup victory of the season. Fiji won in Hong Kong and will contend, while USA and Australia are making good progress up the table. Gordon Tietjens' Samoan team languish in 13th position. The final two tournaments are in Paris and London next month.
Saturday April 15
5.14pm NZT v Scotland
8.12pm NZT v Wales
12.50am (Sunday) NZT v USA
Sunday April 16
Finals day
The team is:
DJ Forbes (Counties Manukau, c), Sam Dickson (Canterbury), Iopu Iopu-Aso (Taranaki), Trael Joass (Tasman), Andrew Knewstubb (Tasman), Vilimoni Koroi (Otago), Sione Molia (Counties Manukau), Tone Ng Shiu (Tasman), Joe Ravouvou (Auckland), Beaudein Waaka (Taranaki), Regan Ware (Bay of Plenty), Joe Webber (Bay of Plenty)
13th man: Lewis Ormond (Taranaki) Travelling reserve: Teddy Stanaway (Bay of Plenty)