Budweiser, an Anheiser-Busch product, was originally designed to be the least offensive-tasting beer on the market. This was an important marketing strategy to United States citizens in the early 20th century. As market globalization has taken hold, people now realize that a good beer can have strong flavors and character, such as some beers made elsewhere in the world. Microbreweries making distinct and flavorful beers have had a lot of success in the USA in recent years. But the mass-market (Budweiser, Coors, Miller) brands still have most of the market share.
While it’s interesting that a Belgian company wants to buy Anheiser-Busch, I doubt they will make serious changes to the products which are already some of the most successful ever. Anheiser-Busch has already started to make different styles of beer, such as Budweiser World Select (designed to be less watery than Budweiser), and Ziegenbock (a beer sold in Texas to steal market share from Shiner Bock, the most successful local beer in Texas). I think we could see more flavorful styles of beer released under Anheiser-Busch bottling authority, but I can’t imagine they would remove successful products from market.
Incidentally, there is now a trend in Germany for large corporate labels to mass-produce their beers, pushing out traditional local styles. There is some controversy about this, but the model came from America’s super-breweries. Capitalism does produce better profits…but not always better products.