Structure the organization to shadow the structure of the market
Each market has its own needs and its own marketing windows, so structure the organization to shadow the structure of the market. A core team deals with the common concerns, while there is an arm of the organization looking after the concerns of each market.
This approach may sit well with the ProductChampion approach. Where variants of a product line are tailored to particular markets, then some part of the organization needs to look after individual products and their variant aspects.