This for sure.
Snake's moveset was made with him in mind. We've never seen a Smash character outright replace another. Except for Toon Link for Young Link, but that doesn't count.
Quite a few of Snake's moves come from a MGS origin.
AAA combo is a classic CQC combo, as is Ftilt
Nikita, Grenades, RPG, C4 are all accessible weapons in various titles
Cypher is from MGS2
Regardless though, as @
APC99
said, you can't just drag and drop Snake's moveset into an AW character. It's not just explosives, but a mix of weaponry and CQC, both things rather iconic to Snake.
On a side note, the ballot page is getting an update? WHAT COULD IT MEAN?!
Could this be the first ballot character confirmation? Is it tying in with something else? (PLZ METAL GEAR! IF SNAKE GETS REVEALED, THE FOLLOWING VIDEO WILL BE ME!)