The strongly supported Orfevre, who looked sure to become the first Japanese-trained Arc winner 12 months ago until he veered towards the rail in the closing stages, is likely to start favourite on Sunday, while Kizuna, the Japanese Derby winner, is also prominent in the betting.
Fenlon swiftly became the bookies' favourite on Tuesday.
Bring Up the Bodies was favourite on Thursday with odds of 6/4, having leap-frogged Umbrella at 9/4 following "recent heavy betting" on the former, said spokesman Rory Scott.
The US actor, nominated for his role in Dallas Buyers Club, was persuaded to discuss being the Academy Award favourite on Wednesday night's Jimmy Kimmel Live.
McKillop, a double gold medallist at last year's London Paralympics, will be a strong favourite on Wednesday when he races in the T38 1500m final.
Four horses, including Cue Card, probably the most popular chaser in training in Britain, were potential favourites on Friday morning for one of the most competitive and eagerly awaited Gold Cups for years, but money came for Don Cossack throughout the day and he set off as the 9-4 favourite.
Frankel, the odds-on favourite for Saturday's 2,000 Guineas, is his grandson.
Yet Bodemeister will still be one of the favourites on Saturday and there are several straws to which his supporters may cling as they try to rationalise their choice.
The Bluebirds meet one of the other Championship promotion favourites, Norwich City, on Saturday.
Sprinter Sacre and Sire De Grugy, neither of whom has had a race so far this season, remain the uneasy market leaders for the Champion Chase at 4-1 and 5-1 respectively, but Uxizandre, the third-favourite on Saturday morning, is out to 16-1 after beating only one opponent home in the day's feature event in Ireland, the Grade One Paddy Power Diat-A-Bet Chase at Leopardstown.
