Speaking of Geno, here is something I want to say...
Remember Fighters' pass 1 and pass 2 so far? As well as the last three characters for Smash 4 DLC? It can be argued that four of the characters in Fighters Pass 1 were modeled after other characters. which were human, and this does not count Banjo-Kazooie. Min-Min is said to be modeled after Captain Falcon in some way, or maybe another character. Either way, the last three characters for Smash 4 DLC; Cloud, Corrin and Bayonetta; were all modeled after existing characters, with Geno coming in as a Mii Costume. Depending on who is next in Fighters Pass 2, if they follow the same route, Geno could be a Mii Costume again if they are modeling characters after other ones. Some have said in the Geno thread that there is a character that could be coming that could be based off Ness, due to glitch based reasons, and they say it could be Geno. However, it could be anyone. Plus, Geno may not exactly be Ness in most aspects.
Not to call Nintendo or Sakurai lazy, to be honest, as they are both far from that, but I think what I said makes sense, assuming that they do in fact go this route. Basing character models off others wouldn't exactly be anything new here.