I expect an answer from you.
"I see X so X must be true."
A lot of what you said is conjecture and "I see it on the internet, so it must be true." Also, the argument of "Ganondorf sucks, so he must have a totally different moveset," makes no sense. He can be good with the same or similar moveset.
The Internet is the main way we as fans can voice our opinions on what characters we want for SSB4, how to improve the online, improve balancing, and of course, the demands to make clone characters unique. It is the main reason why Sonic got into Brawl and considering that I am 100% certain that we won't see thousands of fans march across Tokyo's city to have these requests filled, the Internet is our best and likely only tool to get the message out to the developers. Even if that can be done with a similar moveset, like I said, I highly doubt they're going to make Ganondorf any better unless he gets his own. If he remains shoddy with his own move set in Melee and Brawl, he will likely remain shoddy in SSB4.
The big problem is the "conventional wisdom." I saw the conventional wisdom all the time before Brawl's release (and thought it too) and it turns out everyone was dead wrong. The wisdom here is "Ganondorf must be total different." And who's to say? What about the people who like Ganondorf the way he is?
I'll be frank, if it comes to it, screw the Brawl Ganondorf's main, Sakurai should listen to the majority. The majority is not the Ganondorf's main, it's the people who wants Ganondorf to be able to stand with other characters properly.
Your suggestion of "Black Shadow will have Ganondorf''s moveset," was also echoed during Brawl. Everyone said he would take Ganondorf's moveset. What happened? Ganondorf stayed the same but with a slight change in some of his moves. Falco and Toon Link went the same direction as did Lucas and Wolf. This idea of "Everyone must be totally unique," is made by Smash Brothers fans on the internet and Sakurai obviously doesn't agree. All you are doing is spouting the conventional wisdom only to be proven wrong when the game comes out. Why not try to find out why Sakurai is doing this? It will give you more clarity.
Sakurai will never give an answer for why Ganondorf is a clone in Brawl (The answer he gave in Melee doesn't count as Ganondorf is established in the Super Smash Bros. series) and if he remains a clone in SSB4, we won't get answers for that either. As such, I'm not going to bother searching for it. What answer he'll give us will be him making up excuses.
And I never said that Black Shadow will be in SSB4 (Nor do I care much about a F-zero rep), but I am saying that Black Shadow taking Ganondorf's move set is the best chance for Ganondorf to receive his own move set and it's also the best deal Sakurai can offer to his fans. It gives us an unique Ganondorf and a second F-zero rep, even if Black Shadow is a semi-clone of Captain Falcon, it would at least make some sense, not to mention that this move will not alienate Ganondorf mains, they can simply move to Black Shadow. Even if Black Shadow isn't playable, Sakurai still has zero good excuses to keep Ganondorf a clone in SSB4, regardless of what you say.
I'll end with this: Why does Ganondorf need to be unique. What is there to gain by totally changing him and making a totally new character? Try and do this with out saying "It's to add more variety."
Ganondorf needs to be unique because it is insulting that the King of Evil is a clone of Captain Falcon. Just because he has similar body structure does not give the developers an excuse to make him as pathetic as he is. It would also fulfill a high requests among many gamers to make Ganondorf unique, which clearly overpowers those who want Ganondorf to remain the same.
