Shenton has failed to recover from a thumb injury received in last Friday's 26-18 win at Wigan and his place is likely to go to utility back Gary Wheeler.
Back-rower Chris Flannery is still sidelined with an ankle injury but centre or second rower Sia Soliola is back and caretaker coach Mike Rush has also called winger Ade Gardner in his initial squad.
Warrington's utility back Stefan Ratchford has recovered from a knee injury but loose forward Ben Harrison will miss Saturday's tie with a similar injury sustained in last Sunday's 52-14 win at Widnes.
Coach Tony Smith recalls full-back Brett Hodgson, winger Joel Monaghan and forwards Michael Monaghan, Garreth Carvell and Trent Waterhouse, who were all rested against the Vikings, but second rower Ben Westwood is still recovering from a knee injury.
- Stefan Ratchford