Who should be our next 4th captain, when Iniesta leaves?

When our captain leaves us, the squad will have a vote about who should take the 4th spot as captain.

Messi is vicecaptain, Busquets 3rd and Pique 4th as of right now.

Alba has been here longest, followed by Roberto and after him Ter Stegen, Rakitic and Suarez.

I think there should be internal voting as usual, and it should be on both 3rd and 4th captain since Pique is 4th based on seniority not voting against club recent traditions. Although he will probably still get 3rd captain again.
I would prefer Suarez as a stop gap atm, It is unlikely that someone else outside of Messi & Busquets became captain in the next 4-5 years. Let one of the older guards get it until things are more clear with the likes of MATS & Roberto