He’s the only person who can die and it could make sense in story not only that he’s the only one who could die and for the banquet to still happen like usual because after this arc they are gonna throw the biggest banquet and for the first time since coming to the new world the straw hats will throw a banquet.
So yeah Marco is the only one who is going to die which seems fairly obvious
It's not stalling, he's slowly putting them together, otherwise people would complain how the fuck could the characters just jump to those locations instantly. Oda really wanted Robin to get that entrance, which was the only reason Sanji was in the mansion in the first place.
Chopper will save the day it's impressive how he is still able to maintain focus under the effects of the virus which has spread a lot since last time we saw him, and Hyogoro is a beast can't imagine what a monster he was during his younger years
before sabo ate the mera mera no mi he was first commander and he has great coa now he has getten a strong fruit like mera mera no mi and after he's already trained it's very correct to think than he has the same level than marco (or better)