Ok, I'm gonna write my wishlist for Fp2 here:
1. Isaac. My favorite Assist Trophy. Didn't really have much hope in fp1 but now we have 6 chances for Isaac. Golden Sun's 20th anniversary is next year, what's a better way to celebrate than adding Isaac as a fighter? Bringing Isaac in as a fighter would be good for his fans like us and break one rule: Assist trophies cannot be promoted into fighters in the same game.
2. Hornet. Hollow Knight is one of the popular indie games not yet represented in Smash. She would be unqiue fighter, a spear user with good mobility, circular aoe attack and projectiles, also with a meter. We might be able to yell 'Git Gud' at our opponents, as well. We're getting Silksong in 2020, and adding Hornet as a fighter with the release of Silksong would be internet-breaking and promotinal, as well as breaking another rule: No indie game characters as actual fighters.
3. Lloyd. Never played any Tales of series, but I watched the whole walkthrough of Symphonia and I loved it. With his dual wielding and fast strikes, he could be a swordsman with great combo potential like the fighting game characters.
4. Arle. Like with Lloyd, never played Puyo Puyo, but a we don't really have much of actual mage characters. She has lots and lots of magic, as well as lots of Puyos. She might bring new mechanics such as stacking Puyos in a match, or like in fan movesets swing them at enemies to deal different elemenal damage.
5. Ryu Hayabusa. Was the frontrunner for the last pass until he got deconfirmed. We don't have much ninja-styled fighters, and I'm pretty sure none of them uses a katana. He would bring other weapons like in the older Ninja Gaiden series or have crazy combo actions like Lloyd.
6. Sora. THE internet breaker and arguably one of the most popular characters worldwide. With his keyblade and bunch of magic, he could be really fun to play. I saw him flying and moving in the air just by swinging his keyblade. I'm pretty sure I heard Disney had no problems with Sora getting in, and putting Sora in fighter no.6 or 11 would be a great way to start off the pass, or end the pass with a bang.
These are the 6 characters I would like to see, but they're probably gonna add a Pokemon of some sort. Among the Sw&Sh Pokemons I expect Toxtricity or Urushifu.