With SSJ4 Gogeta's special placement on the roster and how there's only 2 stamps left, it seems like the end of FighterZ. Given the success of the game, there would probably be a sequel coming soon after.
Here what I think the roster will be like:
Returning Characters
Goku
Goku (Super Saiyan)
Goku (SSGSS)
Goku (Ultra Instinct)
Goku (GT)
Vegeta (Super Saiyan)
Vegeta (SSGSS)
Gohan (Teen)
Gohan(Adult)
Piccolo
Krillin
Trunks
Tien
Yamcha
Master Roshi
17
18 (revamped moveset)
Videl
Majin Buu (revamped moveset)
Bardock
Gotenks
Vegito (SSGSS)
Gogeta (SSGSS)
Gogeta (SS4)
Nappa
Vegeta
Captain Ginyu
Frieza
16
Cell
Kid Buu
Beerus
Hit
Goku Black
Zamasu (Fused)
Kefla
Jiren
Broly (DBS)
Cooler
Broly
Janemba
Super Baby 2
21
New Characters
Vegeta(SSGSSE)
Pikkon
Merus
Raditz
Dabura
Top
Caulifla (w/ Kale)
Omega Shenron
Moro
Here what I think the roster will be like:
Returning Characters
Goku
Goku (Super Saiyan)
Goku (SSGSS)
Goku (Ultra Instinct)
Goku (GT)
Vegeta (Super Saiyan)
Vegeta (SSGSS)
Gohan (Teen)
Gohan(Adult)
Piccolo
Krillin
Trunks
Tien
Yamcha
Master Roshi
17
18 (revamped moveset)
Videl
Majin Buu (revamped moveset)
Bardock
Gotenks
Vegito (SSGSS)
Gogeta (SSGSS)
Gogeta (SS4)
Nappa
Vegeta
Captain Ginyu
Frieza
16
Cell
Kid Buu
Beerus
Hit
Goku Black
Zamasu (Fused)
Kefla
Jiren
Broly (DBS)
Cooler
Broly
Janemba
Super Baby 2
21
New Characters
Vegeta(SSGSSE)
Pikkon
Merus
Raditz
Dabura
Top
Caulifla (w/ Kale)
Omega Shenron
Moro