This is why I've always felt the best move is to not actually try for a land that predicts the future, but is instead themed to retrofuturism with an emphasis on more out of the box things rather than real life practical advancements. A retrofuturism themed explicitly to science fiction rather than science fact.
We sort of kind of have that now, but by accident and without intentionality. An aesthetic refresh of the buildings, nixing Buzz, Autopia, and the subs in favor of new attractions, and all of that with more purposeful aesthetic and thematic approach would be pretty evergreen imo.
Stick to the idea of what the days of the past thought the future would be, rather than what it became, or what it could be from our position in time.