According to Rollingstone.com, Adam Lambert Will be the new Lead singer for Queen.  Here is part of the article.

"The intention is to pay tribute to Freddie and the band by singing some
fucking great songs," he said. "It's to keep the music alive for the fans and
give it an energy that Freddie would've been proud of." Queen previously toured
with former Bad Company singer Paul Rodgers taking Mercury's place.

Speculation has been high since Lambert was joined by
surviving Queen
members Brian May and Roger Taylor during his Idol finals appearance in
2009. In November, they performed together at the MTV EMAs in
Belfast.

Via: http://www.rollingstone.com/music/news/adam-lambert-is-queens-new-singer-20120203#ixzz1lM94GN5m