The skinner team aren't allocated skins by HTC. What happens is Superfly or Waffle will start a thread for the new ride in a private skinner team forum with a link to the 3D shape. If none of us want to do it, then they skin it themselves. The initial 3D shape they post is the minimum needed for us to start skinning, it gets reposted from time to time with additions like the cockpit interior, as well as bug fixes and shape corrections.
I don't know whether I'll be doing the default Me 410. It's not an aircraft I'm particularly desperate to do, but I will if neither Fester or Cactus want to do it. It will also depend on if any of us are already busy on another default skin at the time when the Me 410 3D shape is ready to be skinned.