Note: These articles are more for discussion purposes before E3. They'll be short, sweet, and to the point for a brief recap and looking into possible characters/stages for each series in Smash Bros. These also go by a "Don't expect too much" philosophy. Please remember to be civil in the comments discussion.
Third-Parties have been in Smash ever since Super Smash Bros. Brawl. Sonic and Snake made it into Brawl, each with their own stages. In Super Smash Bros. for 3DS and Wii U, Sonic, Pac-Man, Mega Man, Ryu, Cloud and Bayonetta made it in, and like in Brawl, each third-party character has a stage of their own - Sonic and Pac-Man even have two across both versions.
What about this time?
Returning Characters
Assuming third-party characters return, it's impossible not to see Sonic on the roster. Bayonetta is very likely too, due to Platinum's partnership with Nintendo, who funded the development of both Bayonetta 2 and the upcoming Bayonetta 3. Beyond that? It's a bit muddled. Pac-Man is likely, especially if Bandai Namco has a hand in development. Mega Man and Ryu's changes depend on how Nintendo and Capcom are feeling, and Cloud depends on how Nintendo and Square Enix are doing - though both publishers have some high-profile. Snake's the least likely to return, especially since Hideo Kojima is no longer working for Konami, but it's not impossible.
New Characters
There's a lot so we have to kind of look at it based on the company that owns each character. First, multiple characters per company is definitely possible, but it's hard to predict. Level-5 could definitely pull a character out with Professor Layton. Rayman from Ubisoft is also be a strong contender. Banjo and Kazooie aren't impossible, and neither are some other characters from previous rivals. The only ones I'd be particularly sketchy on are Bomberman, due to the current status of Konami, as well as anything from EA. Anything else is practically fair game.
One important note for new and returning characters is a lot of the time, it's popularity that helps make a big push. Of the six third-party characters in Smash 3DS/Wii U, four had new games out or on the horizon - Sonic had Lost World, Ryu had Street Fighter V, Bayonetta had Bayonetta 2 and Cloud has the upcoming remake of Final Fantasy VII.
Returning Stages
So far Green Hill Zone has been the only third-party stage to ever appear in more than one game, having been in both Brawl and Smash 3DS. The chances of any other third-party stage returning is based purely on timing.
New Stages
All we can say so far is that we'll likely see only one stage per third-party character
Author's Note: What are your thoughts on the third-party franchises? What third-parties would you like to see in Smash for Switch? Let us know in the comments below!