Given the prominent shadow in the leak render indicating a roll, it could very well be the case there, as well. And again, the seam in the FMV.
I don't see any inconsistency.
This, along with the Famitsu image of Tomodachi Life, once again tips the believability in favor of it being real.
That's not how it works though. The prominent shadow implies that the shirt ends there on the Smash 4 render, not that it moves inward. It wouldn't leave that prominent of a shadow unless it was obscuring something on a perfect line.
Personally I don't think the Famitsu image reveals anything since we've had an image of the full scale Tomodachi building since July, and the stage room layouts are always randomized, so we'll have to agree to disagree to all of this "tipping it" into favor of believability.
EDIT: If it wasn't already obvious, #TeamFake lol.