If it's ten episodes of roughly an hour each I reckon they're aiming to finish at the end of Alabasta. East Blue does not take that long to adapt.
For the Strawhats I would quite like it if they broadly (and by broadly I mean I'm expecting them to be American, but of such and such descent) stuck to Oda's nationalities, which is actually pretty diverse. Latino main character, supporting cast being Asian (Zoro), African (Ussop), two caucasians (Nami, Sanji) a cgi/prosthetic reindeer and Vivi will be probably be North African/middle eastern. Considering it's a twenty year old series from the mostly homogenous Japan, it's a surprisingly modern group of characters. If anyone gets changed it'll be Robin.
Expect very few big names for the Strawhats, except maybe Robin. Young, up and coming actors are cheaper. Shanks and Mihawk are interesting ones to cast- big roles, little screen time.
It'll be what it'll be. It can be adopted to live action with the effort put in, and imo television works better for it than film. But it can also very easily turn out to be a schlocky cash grab that fails miserably.
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Theyre probably gonna change a lot of it to make it easier for them.
Would be suprised if Luffy recruited multiple crew members in like 1 island. Robin will probably join in the East Blue saga lmao
I think there's a pretty high chance that Zoro and Nami (and maybe Ussop)'s joining gets merged into one episode. The first four islands in the series aren't really distinct visually, after all. It's only when you get to weird floating fish restaurant Baratie that you get something visually distinct and different.
But they'll keep Robin's story intact, I'd imagine, purely because that's an overarching mystery for the first two/three seasons (however they adapt it).