presumably launch characters were in development for around 3 years.
You realize that they didn't just make characters for the entire development cycle, right?
They had to impliment new mechanics, like parrying, instant short hops, directional airdodge, etc.
They had to impliment over 100 stages, many of which from scratch.
All the different new models, items, Assist Trophies and Poke Ball summons that had to be worked on.
The 6 different maps of World of Light.
Testing every single one of the 1000+ Spirit battles.
There's far more to a base game than the characters, which is why I have doubts on a leak that, according to the fanbase, implies Min Min was decided at the same time as the first Fighters Pass.
Do I see an ARMS rep be decided for a season 2 around E3 2019? Yes, yes I do, but Milk-BOTATSU implies that character was in active development. And given that at the time, we only had Joker, with Hero not coming for another month, I have a LOT of doubt concerning the idea that Min Min was worked on alongside Hero, Banjo, Terry and Byleth.
That feels like people looking too deep into fake leaks to justify the Ramen Bomber.