Let me throw my two cents in.
-Mario, Pokemon, and maybe Zelda all deserve to have 5 playable characters
-Bowser Jr. isn't a very likely character in my eyes.
-Even though SMRPG is one of my favorite games, Geno would be an awful character to add.
-My most supported Zelda newcomer is Tingle
-Pokemon Trainer, Squirtle, and Ivysaur should all be cut and Charizard should his own character.
-Lucario deserves to stay alongside Mewtwo, due to his popularity alone.
-Jigglypuff needs to go (sorry Jiggly fans, but she's just not as significant as she used to be).
-Even though I support just about any DK rep, I don't see Dixie Kong happening any day soon.
-Metroid may very well not get any new characters, much to my dismay.
-Kirby's Epic Yarn deserves to be represented in any way outside of a playable character.
-Fox and Wolf deserve to stay, but Falco needs to go.
-F-Zero is perfectly represented with Captain Falcon alone, but I wouldn't mind seeing a new F-Zero character added.
-Lucas won't be cut.
-Earthbound isn't a complete franchise, and I feel Porky would be the best character to add to complete it.
-I hate Chrom and am completely, 100%, against his inclusion.
-I don't think Roy will be returning.
-Hades and Medusa will never be playable.
-Palutena and Magnus have an equal chance at being playable.
-Pikmin has the perfect amount of representation in SSB4 right now.
-Villager is the only Animal Crossing character we'll ever need for Smash, and Tom Nook would be a horrible addition.
-I see Mii becoming a playable character, which terrifies me to say the least.
-R.O.B deserves to stay because he is extremely important to Nintendo's history, possibly more so than Mario.
-Takamaru seems like a pretty redundant character due to his similarities to Marth.
-Sukapon and Mach Rider are the only retros I support for SSB4.
-Snake will not be cut.
Sorry for the wall of blue text, I just wanted get that all off of my chest.