Taking all of these things into consideration will result in debating over whether to move the plumbing *now* for the future shower stall, or just leave it until they do the shower (at some undetermined point in the future).
They will briefly consider repainting the entire room in a different color.
They will decide against that, since the current paint job is only a year or two old anyway.
They will rip out the existing vanity and wall cabinet, mirror and toilet-roll-wood-backing-piece, and they will make the trip to Home Depot with two exhausted and incredibly rambunctious children, who will cause them to nearly lose their minds right there in the store.
They will go home, where Travis will tape up some spots on the drywall after dinner and the kids are put to bed, and then they will decide that that is Quite Enough For One Day.