This comes after a report back in April that Gwen's third solo album was "in the works," even though Gwen herself hasn't publicly confirmed the news yet.
If Gwen does release another album, it'll be her first since 2006's The Sweet Escape. She officially returned to music in 2012 with No Doubt, but the album (which Diplo also worked on) tanked and the whole era wrapped up pretty quickly.
Come September, Stefani will start appearing on NBC's The Voice as a replacement for Christina Aguilera. If she really is working on a new solo album --or even just another No Doubt album-- that'll probably be the perfect time to launch it.