"He is a world-class player, a world-class fielder and a world-class bloke so we look forward to meeting up with him," coach Ashley Giles told the England and Wales Cricket Board's website on Saturday.
The 31-year-old Bell's call-up comes after he was left out of England's 30-strong squad for the T20 World Cup in Bangladesh later this month.
Morgan and Hales missed Friday's 15-run defeat in the opening ODI with knee and thigh problems respectively.
(Reporting By Sam Holden; editing by Josh Reich)