The poster is interesting.
No Alphinaud, Alisae, G'raha and Y'shtola despite their appearance on trailer.
Instead on the left there are: WOL (Viper) going with Krile (Pictomancer), Erenville and the new female Hrothgar (wielding axe, so probably Warrior) who hire WOL.
Meanwhile on the right: Thancred (GNB), Urianger (AST), one new male Miqo'te in all-white as if opposite of Erenville, also Mamool Ja who hire them. By light party rules, both of them are DPS while Erenville base class is something akin to healer, maybe Chemist like how Geomancer Gosetsu done. On top of everyone is two-headed Mamool Ja that WOL fought on trailer (seems a Viper too) and an unknown princess.
Not to mention Yoshi-P is bold enough to release this now:
BTW, Solution Nine is one of Zidane's Trance Ability in FF IX.