That's a really good source (albeit from 2017), but while it does support your argument that sales by other companies dwarf those by Coca-Cola, the latter is still firmly in first place, with 3.3 billion liters sold -- as much as the companies placed 2 to 4 combined.

I guess Coca-Cola will not be replaced in the top position in any short to medium timeframe. While they will dwindle, I don't think one big competitor will gather their market share, rather a lot of small ones.