The festival is scheduled for May 8-9 and May 15-16 in 2015.
A group including casino company MGM Resorts and show producer Cirque du Soleil recently announced plans to build a 33-acre (13.35-hectare) open-air music venue between the Circus Circus resort and Sahara Avenue. It will be called the "City of Rock."
Organizers say they expect more than 300,000 people at the Las Vegas event.
Rock in Rio began in 1985 in Brazil, where 600,000 tickets for the event last September sold out in four hours, according to organizers. Headliners included Justin Timberlake, Beyonce, Metallica and Bruce Springsteen.
The organization also produces festivals in Portugal and Spain.