Of course, I could be wrong about this. Paula and Tetra are unlikely additions, but they increase female roster size, and I better not hear anyone whine about Chrom/Ridley/Geno etc, because their chances have passed. Characters like Pichu, Roy, and Pokemon Trainer could be DLC, but I like this 50 character roster.
He's not on there simply because the Star Fox series is barely relevant anymore. Seeing as the last new (SF643D doesn't count) came out in what. 2006 on the gamecube? And as for Tetra and Paula, I know they're a push, but Tetra has atleast some relevance compared to Wolf.