The presence of the two World Cup-winning All Blacks would come as a tremendous boost to the side for the New Zealand leg of the World Sevens series (January 30-31), after a 28-14 defeat to USA in the plate semifinals of the South African event.
"I'm certainly going to look forward to having those players and players like Sonny Bill Williams, Liam Messam, Ardie Savea, Ben Lam, Akira and Rieko Ioane," Tietjens told Radio Sport.
"But my real concern is the contracted players that we have now - the Joe Webbers, the Tim Mikkelsons, Scott Curry, Gillies Kaka and Regan Ware - and those players that are out injured now back in New Zealand, that they rehab very, very quickly because we need them back as well."
Tietjens hopes those injured players will be fit and available for the National Sevens tournament in Rotorua on January 16-17, and also expects some younger and fringe players to press their case for selection in the All Blacks Sevens side.
"There will be a few players to look at and there's some opportunities for some players to secure some contracts as well," he said.