The Norwary M&G and World Showplace could both be taken out if it was worth it.
That ain't happening for decades and decades.
1. There are plenty of pads and only one rumored new national pavilion within 5 years. So, there isn't any 'need' to free up space.
2. Wishing something away that one doesn't like is not related to reality at all. There are plenty of rumors based on wishes, let's not start a new one.