Actually because it can slightly be attached to this subject (in a way), I am gonna give a shot at explaining my Ness/Lucas theory here as well (I would'nt know if I would put this in the Ness threads or Lucas threads).
I have a hunch that Ness and Lucas this time around could end up being the same character this time just simply one being an alternate skin. I am in no way saying Lucas is a clone but there are a few reasons to why this could be plausible.
1. Skins seem to be a rather big thing this time around. I dont think every character will get one, but Lucas and Ness look similar enough where it would be very easy to make Lucas an skin of Ness or vice versa.
2. Customizable moves seem to be another upcoming big thing, which may lend a bit of a hand to this theory. From what we saw at the last direct, we can so far make two assumptions. One is that every B move will very likely have at least one or two variations of the orginal (ide imagine 2 for every B move on every character but who knows). Second is that while most of these moves are changed or altered versions, so far it seems that the animations for the moves do not change. Mario doesn't make a new animation for throwing a large or small fireball, kirby does the same open mouth expression but blows ice instead of suck up opponents.
Lucas and Ness shared very very similar B moves in this regard and all of which could very easily be turned into customizable moves, each being slightly altered versions of each other (PK Freeze and PK Flash are probably the most different, but could be pretty easy to implement as a separate version of each other)
A lot of people would argue that this would mean that they would be cutting out a completely diffrent A move set from at least one of the characters, which yes I agree, is a good argument for why they would'nt be the same character. However, it would make much less work for Sakurai when you think about it. Instead of having to worry about balancing two different similar characters, he could focus on a single one, and keep the excess B moves for the custom move's, which is already being implemented so no loss there. This would not only keep both Lucas and Ness in the game in their own way, but give a better chance for someone like Masked Man or Porky to be introduced in the game without cluttering the over all roster.
Another argument against this might be the fact that we have a much more of a clone character already in the game through Toon Link. Toon link is a good example (and a poor one, because god damn he has enough moves in his own game to have his own move set). There is one slight difference for this one that could explain why he wasn't cut. Unlike Ness and lucas, who very easily could be skins (only have to add a hat and a backpack for one), Link and Toon link share no similarities in their models. It would be pretty much impossible to have a Toon Link skin for Link, without completely screwing around with hit boxs and such (all models so far do very little to screw around with characters original shape). Sakurai probably wanted to keep Toon Link in because he himself has become his own incarnation of link with many games under his belt.
Dont get me wrong, I am not saying I want Lucas cut from the game, nor am I saying his A-moves and B moves make him a clone of Lucas. Simply that there are a few things that could point to this possibility. We dont have any idea of what Sakurai will do. Had I told anyone during Brawl's development that I thought Mewtwo was getting cut, everyone would of probably laughed and mocked me. So don't take this as a personal attack on your main. Just a little speculation that I have been thinking about and was interested to see if anyone had sort of thought of this.
Hope I dont cause any anger with it.