Blegh, I forgot how exhaustive those RTC threads are to read. I seriously can't stand people thinking each character added must fit a niche. "We need a character that is A", "We already have enough characters that are B", "Sakurai said[citation needed] that we won't get characters that C". As if fans of those characters wanted them solely to fill some arbitrary checklist, rather than out of love of the character or game of origin.
As for Lip in Smash... again, I wouldn't personally keep my hopes up, but there's no need to be outright pessimistic, either. In a perfect world, I think the best course of action is to raise awareness of the series and request for it to be resurrected, so then get Lip and the rest of cast into the eyes of the western gaming community, and then, with a newfound fanbase, there'd likely be a more poignant demand for the character in Smash, If the next Smash happens in 6 years or more, that's more than enough time to help Lip gain some long awaited attention. It worked for Ridley and King K. Rool through the Ridley Revolution and Kremling Kampaigner movements, maybe with some more patience, a certain fairy can have her time in the greenlight...
... ah well. In the meantime, Ultimate is still looking amazing. Can't wait to see who could be added next for DLC, even if it isn't someone I particularly care about; I just want more people to be happy with the game like me. And, judging by what Reggie said, we should get ready to expect the unexpected.