I'm just gonna take a step back for a second and say that, subjectively, this whole leak reeks of fakery. It doesn't make a lot of sense to me why somebody would take photos so close to the screen like this. Why not just take a complete photo?
And as far as the design of the screen is concerned, there are a lot of design decisions that don't feel right to me, but again, that's hard to objectify. The use of the smash logo stripes on the locks feels very amateur, as it's bad practice to overuse a brand element like that. The fact that the images are essentially identical to images found on the website also smells funny. And the fact that any implication of a new character that hasn't been revealed has been shown in some cryptic way where they're cleverly cropped. To me, that communicates that the person posting the photos is trying to make us dance, which is exactly what we're doing.
The first 2 original pics don't show us anything that we should be skeptical about, but all the subsequent images haven't been rock solid like the first 2 images (Ridley, Pacman, etc.)
If this is indeed the character select screen, it's still a reasonable assumption to make that only the first 2 pictures are legitimate.
But again, the idea of fragmenting the starter characters by scattering them among a field of lock icons doesn't feel like something the design team would do based on all the precedents we have seen in past games.