Dead End has 2 bodys just in RotF alone. Both with the same bio, actually... He's also Titanium Jazz in black and red
Most awesome theory I've heard for Deady is that he's actually a body stealing vampire. And well, we all know Movie 1 Devy is actually Brawl and that was a mess up on Bay's end
But I honestly just think this Armorhide is a deliberate name reuse, as an update to the old one. He has the same base colour (IE: black)