Williams has missed the last four matches and would be a surprise, but massive inclusion in the side because of his renowned pace, skill and ability to run the lines. But the Swans will have another look at him before the weekend to determine his match fitness.
Nicks and Schneider have been playing with the Sydney reserves.
Adam Morgan is in line for a quick return to the Western Bulldogs and has been named on their expended interchange bench.
Morgan was suspended a fortnight ago for a match and is joined in the squad to head north by Shane Birss, Ryan Griffen, Farren Ray and Jade Rawlings, who has spent the last two weeks in the VFL.
The Bulldogs will make at least two changes, with Ryan Hargrave suspended and Tim Walsh, who made his debut last week, nursing a finger injury.
WESTERN BULLDOGS v SYDNEY
Sunday, 1:10pm AEST, SCG
WESTERN BULLDOGS
B: McMahon, Harris, Power
HB: Morris, Grant, Gilbee
C: Eagleton, West, Giansiracusa
HF: Murphy, Skipper, Robbins
F: Smith, Johnson, Hahn
FOLL: Minson, Cross, Cooney
I/C: Birss, Boyd, Griffen, Morgan, Rawlings, Ray, Wight
IN: Birss, Griffen, Morgan, Rawlings, Ray
OUT: Hargrave (susp), Walsh (inj)
SYDNEY
B: Schauble, C.Bolton, Dempster
HB: Barry, Roberts-Thomson, Kennelly
C: Mathews, Ablett, Crouch
HF: O’Keefe, Goodes, Bevan
F: Vogels, Hall, O’Loughlin
FOLL: Jolly, Kirk, J.Bolton
I/C: Buchanan, McVeigh, Moore, Nicks, Saddington, Schneider, Williams
IN: Nicks, Schneider, Williams
OUT:
