I love having all those icons there sure, but man having Ryu separate from the 3rd Parties, and Fire Emblem characters scattered here, there and everywhere just looks gross.
Due to the nature of the way they've implemented the DLC, like the only way the characters are there is if you buy them (rather than having them there but unselectable ala Mario Kart), I can't see a suitable fix where everyone is where they should be.
I honestly doubt that they will stop developing characters for this version when the craziness that was buying these most recent ones from the eShop happened. It's been 7-8 months since release already, and the hype is still that big. They'll keep it going for a while. There's no way we're only getting 5 characters, especially when the ballot exists. They're also making amiibo of each character they make which essentially prints money, too. The DLC is already a fairly premium rate.
Also, didn't they confirm the NX is its own thing? As in, not a competitor to their main console/handheld/both if their follow up combines them as expected.
Likewise, I think we could plausibly see 2 more packs of 3. Now that Roy has been decloned to quite a significant degree, I can plausibly see similarly for Young Link and Pichu. Everyone else was already unique. That would bring the total up to 10 which is a pretty good number all around.
Something like:
Q4:
Vet 1 (Wolf)
Vet 2 (Ivysaur)
Newcomer (Ballot 1)
Q2 2016:
Vet 1 (Pichu or YL, or possibly Icies)
Vet 2 (Squirtle)
Newcomer (Ballot 2)
Just because the ballot doesn't finish until October, doesn't mean they couldn't have taken preliminary results into consideration when deciding on newcomers after Ryu.