"I want to find the next Michael Jackson," said Lopez, emerging from a manufactured fog bank on stage at The Forum in Inglewood, Calif., where the announcement was streamed live on the Web (although without audio, inexplicably, for most of the announcement).
Tyler added: "I want to bring some rock to this roller coaster and show if you've got the heart, the talent, the feeling to do this, you could be the next American Idol."
Meanwhile, "Idol" made some key changes that didn't spell "reinvention," but suggested "re-invigoration." Contestants will be allowed to stick with the genre they are most comfortable with, rather than attempt to assume expertise in another.
And celebrity mentors - a show fixture from the early seasons - are gone. In their place, there will be just one mentor: Jimmy Iovine, chairman of Interscope Geffen A&M Records, which will also distribute the finalists' albums.
Both Tyler and Lopez seemed to suggest Wednesday that they would not be comfortable with doling out harsh criticism. However, since Iovine will have a financial stake in this venture, he probably will be.