The land will also be part of the new Epic Universe theme park under construction at Universal Orlando Resort.
Super Nintendo World is currently under construction at Universal Studios Hollywood, expected to open some time next year.
It seems likely that the Donkey Kong expansion will come to Epic Universe, it may even get built as part of the new theme park at the start.
Universal Studios Hollywood has always had to deal with a significant lack of available space, which makes it less likely, though certainly not impossible, that the expansion could happen there as well.