Carra should always have been captain, Gerrard isn't captain material. Brilliant player, but not a leader of men.
With Carra gone, and Gerrard to go maybe in the next few years, whoever we put in should be really being teed up for the main job. I can't see a 'captain' in that current team apart from Carra. I suppose Suarez and Agger 'could' do it, but they're not proper leaders for me. You can't have your captain getting done for racist language and biting people, and I don't think Agger is that respected/feared by his peers.
Maybe our next captain isn't already playing for us.
I would guess Rodgers would give to a senior player that is in his plans, so Agger/Lucas.