I highly doubt they have some grand strategy of misleading people in interviews while secretly plotting a new album behind the scenes.
They're long past that stage of their career. They may not tell the whole truth, and they may avoid discussing certain things until the time is right, but outright playing smoke-and-mirrors games with the fanbase doesn't strike me as very Maiden-like.
When Steve is as vocal and consistent about his preferences as he has been over the years, I tend to take him at his word. He may change his mind eventually, of course, but that's different from deliberately saying one thing while planning the exact opposite.