The fact that it's not even a sure thing if there will be a new album and Nicko is already conceding that he would probably only play on a "few tracks" is a signal that he is no longer really in the band imo. I think the default is going to be Simon on drums with an invitation to play on some of the album extended to Nicko, but honestly I think Nicko is going to choose to hang out at his restaurant in Florida instead of flying to Paris to semi-participate in a new Maiden album.Nicko did mention the possibility of playing on a new album in the Eddie Trunk podcast:
I'd previously made comments that Nicko's playing wasn't up to scratch without major studio intervention. But based on the recent Titanium Tart shows I've changed my mind. He does seem to have got his groove back which is what I was missing on the last TFPT run.
Yes he's missing a bit of power, but nothing wrong with blending some samples in for the mix.