Not really understanding your point about the Ice Climbers--I think we can all agree that in terms of Veterans, Wolf is the most notable (
) , has the least issues (
) and has the least hate (
). Basically, if Sakurai decides to squeeze in one more vet, 90% chance it's Wolf and a 10% chance it's Snake. It's the newcomers, I'm worried about, though. That would majorly suck if Wolf didn't even make the DLC cut
Edit: Because I'm bored, I wanted to clarify the differences between Icies and Rosaluma. Luma, while technically a character, is strongly tethered to Rosalina in terms of what he can do (you attack, he attacks). They can come together to hit harder or Luma can be shot to annoy the opponent elsewere or allow Rosa to ambush the opponent. In the Icies, the duo excel in hitting hard but at the cost of having Nana as a liability. You lose Nana, and the game just got a whole lot harder. It's almost like an extreme version of Ganondorf and Captain Falcon--one uses a character that can respawn easier and be used as another base of attack but hits smaller and the other is a duo who sacrifices convenience for power.
tl;dr
Luma is a projectile who can be launched and whose attacks are connecting to the A button
Nana is a CPU who mimics Popo when they're together--tries to get back do him and attacks on her own when they're seperate