Kolo Touré and William Gallas - Will one of them sit next season?

Wenger has already said that he needs a defensive player that can deal with aerial balls and more importantly winning the second ball. I see some are suggesting defenders such as Naldo, Mertesacker, Kompany and Albiol that could fit into this position but does this mean people want to break up the Toure and Gallas partnership and if so which one of them to sit?