Sakurai on his twitter just said that DLC is finalized and was completely chosen by Nintendo. I think this raises the chances of the characters I picked, and lowers some of the characters like Geno
Also nintendo will pick the popular charcaters not in yet. So maybe like this...
1) Bandana Dee (Staple in Kirby series)
2) Dixie Kong
3) ARMS character (Minmin/Twintelle/Helix?)
4) Captain Toad (thrownin Toadette as Echo or alt)
5) Paper Mario