Nah this is going to be merged. Nothing special about what being discussed that can't be said in the General thread.
M.Trio and 50/50 for Ussop. If he does he'll be the one who will be the most adept at using Observation Haki to survive better. He is in the same type of environment as Luffy plus a maneating Island and his ambition is to be a great warrior and not rely on Luffy's power anymore. He has all the pieces to awaken Haki on his own. Zoro, Sanji, and himself will essentially be Luffy's Joz, Marco, and Vista/Yassop,Beckman, and Lucky by the end of the series.
If his dad and Beckman can transfer haki through projectiles to hit intangibles then he'll develop the skill too later in the series. None of the other SH will develop Haki and be amazed by it when they do see the M.Trio and Ussop use it.
Nami will become black mage/elementalist. No need when she is generating large twisters, mini raigou's, thunderstorms, blizzards, etc.
Franky will have enough firepower, more durable body, and probably give himself a targeting system.
Chopper will get rid of the pill resource for a more effecient way to transform if he doesn't just learn to do it at will. He'll never learn how to fully control M.point he'll just use medicine to trigger the transformation, stabilize it so it doesn't kill him, subconsciously not target allies. Never be able to communicate like normal in that form.
Brooke- Thought it would be cool if his fruit allowed him to become a conjurer of spirits. Start by summoning the spirits of his crew, real Ryuma, and others as he visits landmarks and plays tributes. Instead he seems to be going the typical RPG Bard route.
Robin will never become a primary fighter so she'll not just develop Haki out of the blue. Hopefully she'll play less of a supportive role later in the series. Developing her own version of Gear three, Shiva arms, whatever.
Sanji and Zoro will both be like Rayleigh. Not going to develop specific forms they need to be stronger overall.