LeftyGreenMario said:
But the way those consumables (if they even are consumables) in the first few images are placed resemble strongly the placement in the first two games. What to make of that?
You're right, the first set of images came from the E3 2010 version, let's see what they said about it:
[quote author=Iwata Asks]
Aoyama
At the beginning of development, we were simply incorporating an idea making use of the stereoscopic display function. Then at the 2010 E3, before release of the Nintendo 3DS, we revealed several images.
Iwata
So why did it drag on until now?
Aoyama
After E3, Miyamoto-san played the prototype and said it was just a port of the GC version.
Tanabe
I had heard that at first Miyamoto-san said that something like an RPG would be fine, so for a while I thought that something like the previous one would be fine.
Iwata
That must have meant that you hadn't done much that was new.
Tanabe
Right. So we wondered what to do. Then the idea of using stickers came up. Originally, the plan was to use stickers here and there for solving puzzles on the overall map and so forth, but then we thought, "If we're gonna do that, then we might as well use stickers for the whole thing, including battles," and we decided to begin rethinking the game mechanics.
[/quote]
Unless the last image (that with the "consumables" and the SPM Red Koopa Troopa) came after the E3, when they started adding stickers for the battle, the placement was just to indicate what attacks were going to be performed.