Adrian Lam provides injuries update ahead of Grand Final
Hooker Powell was missing from the semi-final victory against Hull FC, with his absence put down to a family issue.
"It's not a conundrum, he'll play," said Lam.
Harry Powell is likely to miss out.
Prop Ben Flower limped off during the semi-final, and Lam confirmed he will be absent with a hamstring tear. It is a sad way for the Welsh prop to end his Wigan career.
He is set to join Leigh Centurions next season.
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Hide AdJoe Greenwood, available after a two game ban, would appear the favourite to replace him. George Burgess and Liam Byrne are other potential options.
St Helens coach Kristian Woolf expects James Graham will be fit to play after suffering a head knock last week.