You know...this brings up an interesting thought: we've sort of been assuming the mural has been having characters added
to it this whole time, and that they're doing that over a completed blank background, which would make a ton of sense if you had planned to add each character from the beginning. Of course you'd do that, as layers and so forth would help a ridiculous amount.
But...what if it's actually reversed? What if the
entire mural was completed first, and characters were taken
out of it so they could be kept secret?
Think about it: these aren't renders, they're drawn art. And many of them, quite a FEW of them, interact with each other. A notable example is Chrom, a character not revealed until later, is looking down at Robin, who was already there. This implies that the entire mural was planned and drawn
all at once, to be a cohesive whole. That would be the easiest way to make sure the style and forms meshed together correctly, and also that the background would be the right size for everyone to fit correctly when it was done. I daresay it's the
only way you could do that, but I won't say that's definite.
Either way, this could explain why the background is inconsistent--they drew the mural directly onto it, and after cutting characters out, they had to edit it to fill the spaces.
This is a bit reachy, I know. And I'm also aware that many pieces of art are also used for the cover art, which would suggest they were drawn separately. But it's possible those were cut out specifically for the boxart. I just find it odd to consider the mural characters were drawn completely separate, especially when you've got things like Wario and Dedede reacting to PT, and Dr. Mario checking G&W's vitals.
Usually I stay away from background discussion...but I thought I'd throw this in to see what you all think. It's got holes, and I'm sure it'll be blasted apart. But I haven't seen anyone suggest this yet, so why not, for the sake of discussion?