I know some arguments in BWD's favor may not be the strongest, but I just think he'd be a lot of fun to play as, and I think in modern times, he has earned his place as apart of the main Kirby cast. That's not something that can be said about Marx, Magalor, or Dark Matter because their appearances are more scattered and not usually in a leading role.
But if I'm looking at DLC as realistically as possible, I just can't see him having a huge chance for FP2. I'd give him a 25% chance, but that's not worth much because I find percentages to be arbitrary. It seems DLC is more prioritized on getting big names out there, or repping new franchises, or promoting games. BWD, to me, is the perfect base roster choice and it's a shame he didn't make it this time around for that.
I feel the same way about Dixie Kong. I'd love to see her make it into Smash, but at the same time, she feels like a better choice suited for the base roster. I'd say Kirby and DK are pretty well off with their respective trios of characters, but I certainly would not be against either of them getting in. BWD and Dixie would just be more or less extras, putting sprinkles and strawberries on top of an already perfect cake.
I also hope nobody reads into this post too much as some sort of attack against their characters because that is not my intention! I'm looking at this situation objectively, emotions aside, and that's just where my thoughts are at right now. Let's hope I'm dead wrong, I'd love to see one of these two on FP2.