Can I mention that I like that the visual landscape of Future World is somewhat outdated? Just coming in and seeing that blue on silver in the 1980s style "high tech" font was enjoyable. Yes, it's a look aped by gas stations nationwide, but that doesn't matter, it's still futuristic in a nostalgic/fantasy sort of way. Whether it's the colors, the shapes and rooflines, or the SSE wireframe banners at the bus stop that all have that "this was considered futuristic in 1987" kind of vibe, it pulls it off comfortably and will continue to if it's maintained properly.
Change out the pavillions all you want, but keep my silver, blue, purple, and orange/red gradients with a healthy dose of old "nucleus" logos hidden throughout the park.