Speculation arose as to whether or not new needles were being used.

Speculation now arose that the crime was the work of a gang.

Some speculation has arisen as to the character's proper name.

Shortly after the May renewal, speculation arose that this would be the final season of the series.

Speculations arose whether China's basketball icon would ever be able to play again.

Consequently, much speculation arose whether Carter wanted to be traded.

Speculation arose as to how long the production team had been aware of Eccleston's decision.

Speculation arises that these humans may be from Earth.

Following Taylor's death in March 2011, speculation arose about a film based on her life.

Speculation arose that he was either a spy or a member of British intelligence.