Sloane had been under an injury cloud after suffering a fractured eye socket during pre-season, while Walker had a hamstring complaint.
Both got through the Crows’ main training session this week and will be named when teams are released on Thursday night.
“They got through really well, so we’ll name them later this afternoon,” Pyke said.
“Still got three days to the game and we’re very confident both of those guys will come up.
“Captain and vice-captain of our footy club clearly signifies how important they are in terms of their leadership and their playing side of things.
“There’s still a couple little hurdles to clear for them, but the signs are really positive.
“They both trained fully, got through the session really well so we’ll see how they pull up tomorrow with the expectation they will play.”
Meanwhile Pyke also confirmed Curtly Hampton will play his first game for Adelaide against his former side.
“Curtly will play on Sunday. It’s a credit to him because he’s really worked hard through the offseason and the pre-season,” Pyke said.
“His form through the JLT (Community Series) has been really pleasing … he’s basically built week on week. I thought his game against Brisbane two weeks ago was another level up from even what we saw against Richmond and Geelong.
“It’s fantastic for him. His first game for the footy club happens to be against his former club. I know he’s really excited and looking forward to the opportunity.”