If you think about it, it makes sense we have only gotten popular characters so far. Mewtwo was the most popular cut veteran, so they added him as DLC to test the waters of the idea of ssb4 DLC. Problem is, many people got him for free, so to see how well a character can sell, they gave us two more popular characters, and a gaming icon nobody knew they wanted. Now that they aren't stumbling around in the dark about how well DLC will sell, it is very possible we could get some not-so-popular characters. But really, the non-popular characters we have gotten have usually been a character we didn't know we wanted.
Super Smash Bros. only had popular characters because we only had twelve.
Super Smash Bros. Melee gave us
and
. Three out of six of these characters are now beloved by fans, and Mr. Game & Watch has become a regular in the Super Smash Bros. series.
Super Smash Bros. Brawl gave us
and
. Lucas has become a fan favorite, and R.O.B. has quite the fanbase now.
Super Smash Bros. for Nintendo 3Ds/Wii U gave us
and for DLC,
. Many people have accepted the Wii Fit Trainer, and Duck Hunt, and Ryu got a pretty good reception despite people saying he would be generic. (I was one of them)
As far as cut veterans go we have:
The fan favorite as of now.
The almost finished and very popular characters that have a very similar character to use as a base so they can fix them.
The popular 3rd party character owned by a dying company. If the demand is high enough, I'm pretty sure Nintendo would at least try to get Konami's permission. And considering the state Konami is in, I don't think they would refuse.
and
The not-so-popular unique characters that were cut from the main game because of time limitations as well as the fact that they weren't the most popular characters in the world.
The character that sits in the background, and puts Squirtle, Ivysaur, and Charizard in one character slot. This is the only veteran I don't see returning mostly because he wasn't technically playable. If he does return, he would just act like the Random button, except he would only choose Squirtle, Ivysaur, or Charizard. And
maybe it would allow you to switch Pokémon upon death, but definitely not as a Down Special.
The clone to Link and the semi-clone to Toon Link. Contrary to what people believe, having Young Link and Toon Link in the same game wouldn't be Toon Link, and Toon Link again, the two play much differently. Decloning Young Link would actually take him further from Toon Link, and then we could have a Triforce of Links; The power
, the spacer
, and the combos
.
The most hated character in the game sadly. He is known as the clone with the poorly made gimmick. Ironically he has the potential to be one of the most unique veterans. In order to balance him, he would need some new moves to improve his range, and get rid of some of his electric attacks. He would need a new Neutral Special, and then some powerful electric attacks to make him high risk/reward. With all the needed adjustments, he would probably be his own character by the time they were done balancing him out.
As far as sales go, everyone will sell well because it's Super Smash Bros., and completionists alone will give Nintendo a profit. Weather or not they will sell as much as Roy, or Lucas, probably half the characters previously mentioned will sell as well or close to it. Will we get an unpopular character? We kind of already have (Ryu was popular, but not really wanted in Smash), but as far as getting a character like Ivysaur, only time will tell. But it's not impossible.