Well, browsing about I noticed a few things as far as a roster goes, so I decided to make my own little roster thing a while back of my predictions.
Basically I truly believe we'll only get about 35 characters on a reasonable level, the unlockable ones in red. The additional green are others that may make it in if the rumored 40 is true, the ones in blue are like a personal taste, disregard those for whatever reasons.
Though I hate to say it, I don't think my mastered Falco is returning (at least not playable). So far there hasn't been much wrong with the icon theory holding a character for each icon, I'm led to believe the DS icon represents built-in software for both DS and Wii, this includes the Mii Channel. I personally do not see Ridley himself as playable. Not due to his size, but his build. Sakurai did mention others from the Metroid Prime Hunters series in his blog, which includes Sylux (and Weavel).