We had a high profile new stadium application a couple of years ago. Proposed by a well known darling of sustainability.
I opposed at the DCC meeting, saying that most football clubs were unable to relocate, and so being an exemplar of sustainability was best done in the existing stadium. Building a new stadium on green fields by a motorway junction wasn't that green, and most fans will arrive by car. I also said the communities are like jigsaw puzzles, made up of bits and pieces that together make a picture. If you start removing pieces, especially larger pieces, you lose the picture.
During the debate, when a Labour Cllr said words to the effect of "Let's be clear what we are talking about, this is an outline application" I knew the game was up.
Stadia aren't covered in Local Plans, I understand, so can be built pretty much anywhere.