Again, inside info means you have inside info. You don't get things blatantly wrong because you know specifically what those things are. If he has inside information, then how did he know that Palutena or Pac-Man was in the game, but wasn't sure about Greninja and totally missed Robin and Lucina. Why? Because he was guessing. If you have real information, you don't have random pieces missing. There is also the fact that this only started as a "leak" after WFT was shown which further supports that it was a guess and when it was right he used it for click bait.Yeah, but my point is that he DIDN'T GUESS. The roster got changed around. The Fire Emblem characters may not have been finalized when Sal's leaker got his info., which we know was early in development. I don't think a single guess was made.
I am applying the same rules to any leak. If X leak said Greninja was not in they'd be wrong. Same here. It's wrong. It's dead. Get over it.