Yes, we have to keep the interest up.
It's tempting to be the armchair Sakurai roleplayer and predict that a character like K. Rool would not be chosen for DLC. There may be merits to that point of view, but it is far from certain. And ultimately, it just hurts our chance if we accept being disappointed because we see disappointment as an inevitability.
We need to keep stubbornly pushing through.
Of course, we have no idea what the day 1 roster will be like. He may already be in and we don't know about it. But it's always good to think ahead and think of all possibilities. I think that's how the Kremling Kampaign got started in the first place.
BTW, something you can do today is probably RT/favorite Kremling Kampiagner's tweet to Sakurai!
And resist your inner pedant commenting about Bowser Jr or Mewtwo. Lol. Think BIG picture. And BIG PICTURE the message is clear. Help amplify it!