[quote=@Viv]
Might be better to focus on the Pirate group or Marine group instead of trying to have your cake and eat it too. Giant anime sandboxes always end up have a lack of focus which devalues the story the GM is trying to tell. Also gives you less work.
[/quote]

That's where the [b]Guided[/b] Part in the Guided Sandbox will be hashing down. I hate RP based on a single group because it gives little toe no room to flesh a character put individually; I hate when character progression is dependent on the group vs  the efforts of individual players. Ill have some time to give it a better structured explanation today; probably. 

But for now just think of THIS concept. There's about 5-6 different routes to the Grand Line; instead of exploring every island individually there'd be a choice between a choice between islands per arc where the role player groups will decide upon themselves where to take their story for that particular arc. This in my opinion gives the illusion of a sandbox (entirety of islands to explore and expand) but still be under control and managed (limit story based options)

[quote=@Restalaan]
Agreed on the need to focus on 1 group, but if the GM feels like they can handle it then it might be possible for them to do both group.

I am more partial to the marines, but that is my preference.
[/quote]

As you may already know of course; the group size and number will be determined on the amount of players. Though NPC creation will be allowed to an extent. Im willing to play damn near anything in this particular universe to be honest but id hate to be a Marine under Sakazuki right now 😂😂😂