Since now this chapter is super relevamlnt to the conversation, I feel the need to quote myself here:
To add to this, in the popularity poll art every character was drawn next to someone they are related to in some way. The Yonko each had a corner and they were drawn next to someone they are related to:
Blackbeard drawn next to Ace
Big Mom next to Katakuri
Kaido next to Oden/Yamato/Hiyori
Closest characters to Shanks are 3 marines (Garp,Aokiji,Koby) and CP0 Lucci.
Oda definitely has plans for Shanks involving the WG/Marines.