What I don't understand…this game is supposed to be based on Impel Down / Marineford / Sabaody
For that to be true...there are still characters missing. The roster SHOULD have been
1. Luffy
2. Zoro
3. Nami
4. Usopp
5. Sanji
6. Chopper
7. Crocodile
8. Jimbei
9. Hancock
10. Ivankov
11. Buggy
12. Mihawk
13. Kuma
14. Aokiji
15. Kizaru
16. Akainu
17. Magellan
18. Ace
19. Blackbeard
20. Whitebeard
21. Robin
22. Franky
23. Brook
24. Shanks
25. Smoker
26. Bon Clay
27. Mr. 3
28. Kid
29. Law
30. Moria
Bon Clay and Mr. 3 since they were such a huge part of Impel Down
Kid and Law because they are the most developed supernovas and would fit for sabaody
Moria because he's one of the Warlords, most recent enemy, and was at the battle of Marineford
Shanks because he ended the war and has been in pretty much every other One Piece game
Smoker because he's a very important character, was at Marineford, and has been in pretty much every other One Piece game
Robin, Franky, and Brook are obvious. This is pretty much the first game to exclude Robin since she was introduced.
Now, if they were to make the game based on all of One Piece?
31. Shiki
32. Eneru
33. Lucci
34. Perona
35. Kaku
36. Wapol
37. Foxy
38. Kuro
39. Krieg
40. Arlong
An additional 10 characters - fan favorites in Perona and Kaku (also some of the more developed side enemies), all the East Blue villains, Lucci and Eneru who I actually think should just be in every One Piece game....and Shiki.
If there is room for any more (there is...JUS had 56), I'd probably include vivi as well. She's a member of the Straw Hats...I think she deserves to be in.
Of course more minor characters (and those who previously appeared in OP games) like Marco, Garp, Sengoku, Rayleigh, Ohm, Wiper, Hina, etc. would stand a chance as well, but wouldn't be as likely.
I would go with the first 30 for a game like this....probably would've added in Eneru and Lucci as well. Sequel would go up to the 40 mark and maybe a couple other minor characters.
Sequel has to have Part 2 alts