Ness was in the original SSB, so far I haven't seen a new Earthbound game. I also doubt Ice Climbers has a new sequel coming out.Pit would never be in this game, unless they where going to make a new pit game!
And Kid Icarus is not "cruddy" as you put it. Also you're bad at math, the game was released in 1987, which makes it 20 years old. But in addition to that, Kid Icarus was in the Captain N: Game Master series, along with his nemesis the Eggplant Wizard. (He wasn't named "Pit" in the show or comics.)
I do hope they make a new icarus game, but I don't think his inclusion is advertisement, I think it's a reward for all of us old school nintendo fans.