There should be foreshadowing of it in Egghead then..
The reason there hasn't is because no one we've met on Egghead is joining
If Stussy's not dead she's going with Vegapunk, it's been made very clear that she cares about him the most. Not only was the first thing she said after joining the SH's side was asking where he was but she took a bullet for him as well.
Vegapunk is going to the Revos after escaping the island as it established that connection to dragon early in the arc, potentially with Saul if he goes to Elbaf with the crew first
Kuma's memories are either gonna be transported or implanted into S-Bear, OG Kuma, or the ancient robot and that is going with Vegapunk
Bonney will stay with her father as that is her motivation for her character, her enemy is the WG which while it's also the SH's enemy they are not specifically gunning for them right now. The crew's goal is the One Piece. So she will also go and join the revos due to all of her connections to it.
Lucci has made his alignments clear at this point, so has Caribou
well, no, Oda shows us that they need a lookout right from the start of egg head. Sunny is submerged by an attack because no one was keeping watch.
Oda shows us that they needed Bonney to realize the danger -> shows a need for the SH.
. Oda shows that they need a carpenter => introduces Franky. Oda shows that they need a helmsman => Jinbe
and right at this moment of this event, Oda shows us the rabbit barrel propeller which is clearly a reference to the position of lookout because barrelman = lookout.
and even as a support for Ussop. We saw in dressrosa that he needed a lookout (Viola) to guide him while he sniped.
I didn't even realize it was specifically called the "Barrelman" role
Also nice showin that they need someone as a lookout who will be able to give info quickly
If they had one on the ship the Straw Hats would've never been in trouble
Just like Jinbe we'll see what Conejo Blanco enhances with the role that'll make it special
Mink physical traits and electro here we come