Also, now we know that at least Bruce is in favor of doing one more Iron Maiden album. As for the others, we already know what Steve has said-there doesn’t seem to be much enthusiasm on his side. I’d guess Adrian and Janick would be on board with the idea as well.
From Nicko's Blabbermouth interview:
"McBrain also talked about the possibility of MAIDEN making another studio album and the likelihood of him appearing on it. Nicko said: "Watch this space. That's a question mark. And I can't answer it, because I don't know. I did speak to Bruce [Dickinson, MAIDEN singer] — in December I [appeared at] a Monsterpalooza [convention] with him in California. And I said to him, 'Do you wanna do another record?' 'What do you think", he said, 'cause he is the baby of the band. He's got that baby gene in him. Look, he's just been in a studio and finished a new album, solo album, after 'The Mandrake Project'. But he said he wanted to do one, but he didn't know if anybody else wanted to. So that could change. That was three months ago. They obviously still talk to one another, and I don't see why not. And if they do, I would be delighted to go in and do a couple of tracks. I don't think I would do the whole album because [of] my handicap [following my stroke]."