Samurai Goroh
Popularity: I'm not sure why people think Samurai Goroh is the clear choice over Black Shadow when in Japan, Black Shadow is by far more popular among Smash fans. That said, he's more popular than Black Shadow in the US, and more on his own terms (while some of Black Shadow's popularity is coming from Ganon fans who want Ganon to have his own moves). He's definitely at least the 2nd most popular F-Zero choice for newcomer.
Relevancy: Samurai Goroh, in addition to being popular, was in Brawl as an AT.
Design: Personally, I don't find Goroh's look that great. Anywho, he uses a sword and he's a fat samurai. But like Captain Falcon he doesn't have any moves, really. At least not in the games. There may be some moves in the anime they could use. But they'll most likely just have to invent a move set. The problem is that there are similar characters like Takamaru (or other sword users) that have more interesting move set potential.
Roster and Competition: F-Zero isn't getting more than one new slot. And it's not even likely to get a new slot. Sakurai has said that he wants to even out franchise representation though, so it's still possible.
But he does have some significant competition from Black Shadow. As I mentioned, Black Shadow is much more popular in Japan (more wanted than the majority of characters), and in the West, Black Shadow is not THAT far behind. I have a feeling that Japanese desires are weighted a little more heavily in the process. Not necessarily intentionally, but Sakurai spends most of his time interacting with other Japanese people, and I don't think the decisions are based purely on hard data. But he doesn't have the hugest edge, since Goroh DID get the AT. Then again, maybe Sakurai just thought Goroh made a better AT?
Samurai Goroh chances: 8%
I think F-Zero's chances of getting a new rep are worse than 1 in 5. And I give slightly more than half of that to Black Shadow. The rest goes to Goroh.
Goroh want: 30%
As I mentioned, I don't like Goroh's design that much. And I think there is a large selection of better sword users to include. He could be a great ham, I suppose. Just like Falcon. So he might be fun to have in the game. But then again, it seems Black Shadow would be just as big of a ham, if not more. And I'm biased a bit because I'm one of those Ganon fans - and Black Shadow getting in would practically guarantee a true Ganondorf move set.
Lucas prediction: 74%
People have been mentioning Lucas, Ike, Lucario and Toon Link in the same breath this whole time. I find it hard to believe he will be rated way higher than them (much less higher than Jigglypuff).
Nominations:
5x Mike Jones
Captain falcon confirmed as MK8 racer!
That's...
Actually a really good idea.