As far as I know:
- Sol is still the current main protagonist. The anime may change that, but I dunno how much it will sway character selections.
- When Guilty Gear characters crossover it's usually Sol, Baiken, and/or Ramelethal, with Baiken seeming to appear a lot by herself.
- Sol and Ky have the highest legacy as mascots within the series.
- Sol is constantly described as a rush down character, which would definitley be way different than Ryu, Ken, and Terry, who are more neutral focused, and even barring that, Guilty Gear's mechanics will make him stand out no matter what.
- That last part is relevant to the more neutral focused Ky when it comes to considering him as a playable character.
EDIT: My guess would still be that Sol's the most likely.
EDIT EDIT:
He has a projectile in Gunflame, but IIRC it's a more niche tool on him, and in Super Smash Bros. it would be genuinely terrible without modifications.
its also worth mentioning that daisuke himself said strive was the end of sols story.
sol himself is a spicy shoto.
he isn't the very basics like ken and ryu, he still has a reversal uppercut that can function as an anti air
a projectile that can go halfscreen, not full screen but considering how sol is played a fullscreen one wouldn't be super interesting on him
and a funky tatsu, ky is the much more traditional shoto whereas sol is a shoto who specs into rushdown and big damage if that makes sense?
hes also just blatantly overtuned rn.
either way i don't think it matters, if theres a guilty gear character i dont see how it wont be bridget. thats just a giant pile of money no other character would make. and we're at a transitional point where sin is taking overthe mantle from sol really.
may as well go to the most popular character from the series.
EDIT: TERRY ISNT A SSHOTO
sol is like terry on steroids, where hes a semi shotoclone rushdown however the actual shoto parts are much more relvant on sol than terry.
half of sols game plan is vicisous viper.'
and also kazuya and min min already set the stage for the main character not being the palybale character at least from a fighting game
EDIT: shes a character that escaped the frnachise and blew up into mainstream interent in a way very few characters ever can.
theres a reason theres so much pushback in the community against bridget merch, it sells so well a lot of companies dont find any value in even producing as much merch for the other characters ,as a fan of the series for years i just dont see any future that arcsys doenst ask sakurai for bridgette to be the character he adds becuase she'll make more money, 100% and by a big margin.
theres a reason theres a meme that bridget fans dont play the game.
i'll be happy to be wrong on this and get sin or maybe even ramlethal or may smth. the next smashgame will probably come out after the next guilty gear game anyway.
also thats not touching on the moveset potential.... imagine min min, but also with a projectile that can act like a boomerand and is activated whenever she wants, and she could banjo dash into you, or she can just, fly away and do kazuya combos.
bridges kits were very weird and unique, especially the plus R one
there are whole graphs to describe her game plan and her unique yo yo throwing and flying gameplay ( you can fly to your yo yo while it is in motion)
it'd be something basically unseen in smash, a true mix up character that has everything but good damage and ko potential,
bridgets offensive pressure is some of the best in the series but the actual damage is pretty garbage if that makes sense
tho the topic of guilty gear does make me question hwo they will handle the music.
I would also like to clarify not much precendece exists for birdget, becuase while she was alwasy a big fan fave amongst the community she only exploded in 2022 after it was revealed she was trans bassically, and added to strive, she went viral after that bassically. so this is only post 2022 so there hasnt been much time for crossovers and gg has alwasy been prettyy corssover averse.
from my memory
Sol in kof mobile and river city girls
baiken in samsho
dizzy in kof mobile
and Jam kuradoberi in river city girls