Develop one flavor that you'd personally be willing to pay for first imo before investing too much into distribution plans...
You'll find out why most commercial juice sucks: making crappy juice is easy.
Anyways to answer your question, FA is the safest bet for trying flavors unknown to your palette that sound good - they probably are. And there's no shortage of delicious FA recipes on VU to get you familiar with clever usage of ingredients.
I think VU reveres the creative process more than other communities, since there are a lot of DIY mixers here. If you're asking for a free plug and play recipe to sell... no. lol.
Moms share recipes, bakers guard recipe secrets because they're personal. Just my $.02. Maybe it seems petty but like I said, develop one recipe YOU'd be willing to pay for, and then reevaluate.