For what it's worth in the terms of investment to allow USH to shine, it needs to be a well balanced experience that caters to all demographics.
Not just Nintendo. Despite how that's looking to be the Transformers 2.0 in a boom; I'd rather see Universal keep to their strengths of in house brands, and then occasionally doing something with a third. It's why I think F&F Hollywood Drift, The Bourne Stuntacular, and a Sing: On Tour package could be a major boom to set precedent and allow NBCUniversal brands and stories to be set as the prominent, in a park that's especially rooted with that lifeblood that is NBCUniversal's film and television, across all spectrums of genre.
As far as to get back to Mummy, perhaps it's just me, but I'd actually be fine if it gets levelled for a lagoon with more walking space. Give the area a facelift like how Universal Plaza helped reshape the Upper Lot.