I'm hoping for something in the Pink Floyd-direction or a bit more like Moving To Mars or just arty in some way. It would be very fitting regarding the space-theme and because they can sound that way.
Though I like Higher Power it's not the kind of style I would have hoped for really.
The track "Music of the spheres" sound more like what I would love the album to sound like, but would have been awesome with a whole album in that style with some space rock thrown in.
But Coldplay have become very diverse soundwise with all collabs etc so I don't expect a concept album in that way I'm afraid.