Hulk is a massive mechanical contraption that has the luck of being placed in the land with the most modern and fictional tech-like aesthetic of all of them. The Cobra Roll immediately outside of Port of Entry acts as a sort of invitation to the Marvel side of the park and an incredible entrance through the Marvel Bridge. The lack of a big archway or sign saying Marvel Super Hero Island compared to Suess, JP, Potter is because Hulk does the same job much better. Placing a blue top hat on the direct other side of the park could serve a similar purpose if it was dead center as you walked through Port of Entry. Fortunately, the iconic Discovery Center took that job and real estate back when the park first opened.
The difference between Hulk's Cobra Roll and the Velocicoaster's top hat is that the top hat is in an unfitting location, covers up an in-universe icon with something that never existed in any movie/show/book, and that the track can't be as easily waved away as non-diegetic like Hulk can due to the differences in aesthetic. It didn't fit in Potter and it doesn't fit here. I'm sure we'll all get used to it, but comparing it to Hulk is ridiculous.