I was expecting something similar to that, I thought that they would obviously announce Pikmin 4, and along that maybe they could reveal Louie as an Olimar echo, and of course, I was also expecting Mother 3 to finally be announced for localization! Ness and Lucas show what the games are all about, mainly PK and PSI, and Porky could be a great Earthbound rep without any PK, PSI abilities. I've heard that Porky is now the most wanted in Japan (one person told me, so I rather not believe that), maybe, but he for sure is wanted a lot now. Perhaps if Porky doesn't get in as a boss we can still hope for some sweet DLC! I wonder if they could probably pull off something like Mario Tennis Aces, one new character each month, but I think that seems like too much work for them.
I also never thought of Porky showing the dark side, honestly I don't know why people want Giegue, he's literally inside a glass, he's immobile, he'd better work as an assist trophy, plus Porky has an even more interesting personality in my opinion. Lately I've seen people argue that Earthbound is a dead and obscure franchise so that it shouldn't get any new rep, but when getting Poo, Paula, Kumatora and Boney in Ness' and Lucas' final smashes, it's obvious that we're getting more representation, and the obvious is Duster becoming an assist trophy, there's no reason for leaving him out. If Porky gets in as a boss, I'll accept it, if he only gets a trophy, I'll be mad, if he doesn't appear, I'll hope for DLC.
Although you say Porky has been in since melee, it's sad Porky only got a trophy in Sm4sh, but if we look it in another way, he also got a Porky Statue trophy!
I'm guessing we'll get him as DLC, maybe one of the last ones, or first ones, depending on what order Sakurai decides to go, if he follows an order, my point is that although he's getting demanded a lot now, I guess in the ballot he wasn't popular enough to get in the base roster, but I still think he could be in by surprise, I still believe that Mr. Saturn in the mural means something...