A.P. Moller-Maersk A/S expects logistics revenue to surpass the ocean business by the middle of the decade as the container giant warns of “dark clouds on the horizon” for global shipping demand. Maersk Chief Executive Søren Skou said in an earnings call Wednesday that the Denmark-based company, one of the world’s largest container lines by volume, is maintaining its focus on transforming from mostly an ocean shipping operator to becoming a global logistics juggernaut. Mr. Skou said the strategy should help insulate Maersk from the boom-and-bust cycles of the container industry. “Our strategy is not to gain market share in…