David Bridgwater could turn to Tony McCoy for The Giant Bolster in the William Hill King George VI Chase at Kempton on Boxing Day.
Runner-up in the Cheltenham Gold Cup, the seven-year-old made a satisfactory return to action when third to Silviniaco Conti in the Betfair Chase at Haydock last month.
He was ridden on Merseyside by Tom Scudamore, who has been on board for eight of the gelding's last nine starts but would be required to ride Grands Crus for David Pipe should he take his chance.
Bridgwater said: "He's Tom's ride, but if Grands Crus runs he has to ride that, end of story. It's all up in the air, but I've been talking to (agent) Dave Roberts over the possibility of AP McCoy being free."
Barry Geraghty has yet to make a decision on whether he will partner Finian's Rainbow or Riverside Theatre.
Finian's Rainbow won the Queen Mother Champion Chase at last season's Cheltenham Festival, but struggled in heavy ground on his reappearance at Ascot in November.
Riverside Theatre, who finished second to Long Run in the King George two seasons ago, landed the Ryanair Chase at the Festival in March but has not been seen since he was pulled up at Aintree in April.
The Irish jockey told At The Races: "It's a very difficult call - you don't want to be offending anyone, either.
"Both were good winners at the Festival and I think both would get the trip. It's a very difficult one and we'll let it run to the wire."
31 October 2014Lady proves a champ
Dettori works Breeders' Cup magic
Day to remember for Ellison
Johnson remains under observation
Conti chasing second Charlie Hall
Terror scares Newmarket rivals
Filleule faces Champion test
Terror scares off Newmarket rivals
Sgt far from Reckless at Uttoxeter
Little King wears Down Royal crown
Nicholls goes on Charm offensive
Fishers angling for Wetherby prize
Lavelle star Bec in business
Weld out to break new ground
Osborne ready to 'roll the dice'
Dank bids to sign off on a high
Turf glory in sight for Telescope
Red Ed upbeat about Cadeaux
Aktabantay out of Breeders' Cup
Tearless secures Good Friday ticket
Overnight stay for Johnson
Crawford banks on Izzini progress
Toast could make Spencer think
Road charts route to Royal riches
Grece excels at Saint-Cloud
Hawk given Greatwood option
Hannon: Early speed key for Osaila
30 October 2014Tearless takes Lingfield honours
Johnson taken to hospital
Royal summons for Apache
Bowe takes aim at WKD bullseye
Hootenanny 'smoking' for BC mission
Avenue roads lead to Newmarket
Shu to be kept busy
Scu sweet on Sensation Ascot raid
Murtagh succumbs to Cup charms
Dandino to stay in Australia
Glance denied Mackinnon defence
Bailey ace rules Supreme at Taunton
O'Brien hit by Magician blow
Diablo in big-race picture
Buckley raises Toast to Osborne
Pastille seeking four-timer
Conti all set for Charlie Hall
Barnes out to storm Saint-Cloud
Williams issues Buywise warning
Lynam reveals Slade stalls fears
29 October 2014Lame Magician out of Breeders' Cup
Diablo in big-race picture
Mullins enters strong Hennessy team
Damaged hock behind Estid reverse
Eckhart team rocked by injury blow
Hunt Ball makes Power play
Morgiana a T bone of contention
Kirby ponders Buttons French raid
Glance camp turn to Williams
Wohler trusts 'professional' Moore
Red alert to Cup challenge
Head targets more Mile glory
Mile hope Toronado in 'great form'
Telescope camp banking on Moore
Twiston-Davies link excites Moore
Flying third to Bob on hurdling bow
Harden to test top staying waters
Godolphin take share in Belardo
Mullins has big guns at Down Royal
Annacotty set for Kempton return
Powell and Bradley cleared
28 October 2014Fingal camp on weather watch
More injury woe for Popham
Dickin unveils Thomas gameplan
Power stalls in Flemington spin
Toast drawn nine in BC Classic
My Ambivalent passed fit by vets
Harry out to bring House down
Three and easy for ton-up Hanagan
Wood carves out Galway verdict
More Of That in Wetherby frame
Big guns confirmed for Charlie Hall
Byron pencilled in for Far East