Complex sentence: That same year, rumours swirled that Oropeza was to replace Zach de la Rocha as the lead vocalist in Rage Against The Machine, among others, such as Chris Cornell, Chuck D, and B-Real of Cypress Hill.
Split into simpler sentences: That same year, rumours circulated that Oropeza was to replace Rage Against the Machine's Zach de la Rocha as the lead vocalist. Other replacement contenders were Chris Cornell, Chuck D, and B-Real of Cypress Hill.