It's Captain Kane if he stays, to me that's 100 per cent
If he leaves, I would think maybe Hojberg but far from sure
Agreed that they are leaders but both of those guys have a great deal of speculation around them being sold.
Moreso than many others. Some of the more experienced players like Dier, Davies, Forster, Lo Celso, Ndombele, & Perisic will most likely be moved on let alone play regularly to warrant a captaincy. Honestly don't know much about the other first teamers & their leadership skills.
Maybe that's telling... maybe not.
Romero? Too rash / emotional.
Bissouma? Not here long enough.
Son? Probably.
If Kane doesn't sign or gets sold, then, once healthy, I would pick Bentancur. Talented, liked & respected, & got that steely look in the midfield.