I think there will be some cutbacks in marketing, but AB's presence in sports marketing will still be strong. They didn't buy AB to lose money, and AB has a strong track record of marketing that works.
Besides, InBev learned a costly lesson when they bought Stella Artois. After they took over, they cut Stella's marketing budget in half. Then the sales tanked so they boosted their spending close to what it was when they took over. They cannot afford to make the same mistake this time around.