In total 30 nominees will be announced, with the ceremony scheduled for 3 December.
Regular names like Cristiano Ronaldo, Lionel Messi, Messi and a few others are expected to make the 30-man list of nominees which will be revealed during the day.
"The betting suggests Messi and Ronaldo's grip on the Ballon d'Or could be coming to an end this year as Luka Modric is odds-on to win the prize following his performances at the World Cup with Croatia and domestically for Real Madrid", said Coral's John Hill.
The Ballon d'Or, a prestigious award presented since 1956, is given to the best player of the year.
Team-mate Bale is nominated after playing a key role in that European triumph, which included two goals in the 3-1 final victory over Liverpool, while Aguero gets the nod after scoring 30 times in all competitions as City won the Premier League and EFL Cup.
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Real Madrid playmaker Isco and Chelsea midfielder N'Golo Kante have also been revealed as nominees for France Football's prize.
Two goalkeepers are also among the first 15 - Thibaut Courtois of Belgium and Real Madrid and Liverpool and Brazil stopper Alisson Becker.
Four goalkeepers are also among the 30 - Thibaut Courtois of Belgium and Real Madrid, Liverpool and Brazil stopper Alisson Becker, Tottenham's France World Cup victor Hugo Lloris and Atletico's Jan Oblak.
Manchester City's Sergio Aguero and Kevin de Bruyne are contenders while Liverpool's formidable top three Sadio Mane, Mohamed Salah and Roberto Firmino were all included.
Thirty players will be announced on the shortlist for the 2018 award.