The 'Party Girl' group said that they might end up resembling Slipknot or KISS - and could even replicate the rock bands' distinctive attire.
Guitarist Danny Jones told Bang Showbiz: "I reckon in 10 or 15 years we'll either be like KISS or Slipknot where we cover ourselves in make-up."
Bandmate Tom Fletcher added: "It's hard to tell how we'll be in ten years' time. This time two or three years ago we'd never have imagined this album to be like it is, and each time we go into the studio and record an album you never really know what it's going to come out like, or what influences we're going to be into."
McFly recently revealed that they had contemplated featuring a rap on their forthcoming album Above The Noise, which is released in the UK on November 15.