Frontman Ed Macfarlane explained that their latest material may not fit within the Friendly Fires mould, and that they may decide to unveil it as part of a separate project.
"We've been working on eight-minute-long tracks that don't sound anything like what we do now," he told The Mirror.
He added: "The music is what it's all about for us so if it means we release under a different name then that's fine."
The band headlined the second night of this year's Lovebox Festival in June.
They will perform at the upcoming Berlin Festival alongside Franz Ferdinand and Sigur Rós.
The festival will be held on September 7 to 8.
Watch Friendly Fires' 'Hurting' music video below: