I suppose that, in the name of catch-up and forum cred, I ought to publicly opine about the (potential) (remaining) newcomers.
Here goes:
-Chorus Kids would be cool. Bunch of cuties running around. You will notice that my present avatar features one of them, so my bias here is front and center.
-My only exposure to Isaac is the Brawl AT. His only exposure to me was a significant factor as to why he missed the cut in Smash 4. I guess it evens out in the end, so I'm neutral on this one.
-Sonic Adventure 1/2 were my entry points into the Sonic. So I'm fond of Shadow, even if he naively thinks chaos can be controlled.
-I would Mach Rider, but unfortunately, I don't even Mach Know Her.
-While I have no attachment to Geno, I know he means a lot to many here, so I'll gladly allow it. A star-sent saviour in the form of a wooden puppet, come to fulfill the hopes of the masses. Which is apt, since -- little-known SMRPG fact! -- his body was carved from the Cross.
-Banjo-Kazooie takes the cake, the quiche, and a good chunk of that soufflé, don't mind if I do.
Like many, I too wonder about Incineroar. I specced into Rowlet in Pokemon Moon, which happened to be my very first mainline Pokemon game (Stadium 64 and Snap at my left hand and my right, where you at son), but a flaming cat dandy would serve well. As would have Dixie, if it's to be believed that she was considered, but cut. Who even does that btw.
Lastly, for posterity, my quickfire darkhorse no-chance dreamteam, so you know where I stand -- Gengar, Amaterasu, Goemon, and Shadowman (from the obscure Acclaim title).
I know.