Why are people saying who they WANT to be taken out of the Smash series? That's just stupid. I mean, I understand saying things like "Lucario probably won't make it into the next game", but how could you benefit from a character not being in SSB4? It's already almost guaranteed that they'll nerf Dedede's stupid dthrow, fix Snake's hitboxes, give MetaKnight some attack lag, etc., so whatever characters you can't play well against will probably be easier to play against in the next installment.
Edit: That being said, I think Lucario will be replaced by a new human-like Pokemon with a third jump that doesn't hurt enemies and a neutral special that's identical to Mewtwo/Lucario's. If Toon Link stays, I think they'll bring Young Link back (with a unique-ish moveset), but I think they'll replace him. Whether it's to replace TL/YL or just as a new character, though, I really hope they put in Deku Scrub Link. I also think that Sonic WILL be returning, simply because so many fanboys would get butthurt and not buy SSB4. Ike's out, the next sword-wielding Fire Emblem lord will be replacing him. I don't care whether or not they were planning to make Roy return, they didn't, and that's just fucked up to get rid of the toppest-tier character in Melee (yes I'm trolling) and keep the low-tier Brawl replacement. Also, Ike in Brawl is slow, and he uses fire, and his Aether doesn't heal him, and the majority of his attack animations from FE10 were left out, despite the fact that they'd make perfect smashes/tilts, so you know they fucked him up too much to let him come back. Also, as much as I hate to admit it, I think Olimar might be on the chopping block. Most casual players see him as "that character that sucks and just spams pikmin" and most competitive players see him as "that character that might be kinda fun to play as but I don't want to take the time to learn him", which means he's getting a lot less play than he deserves. ROB will return, despite what everybody thinks. He was put in for the same reason as Game&Watch, so that the older crowd would still play. They'll probably add a couple more classic character like Donkey Kong Jr. (unlikely, but that'd be cool) or Pac-man (a bit more likely).