I love the: “might be…”. Easy words.
It could depend on whether there has been anything built on it at all, whether green belt/AoNB etc. You could always try NPPF paragraph 55. On the final bullet there are a number of houses which have permission on this basis but its not an easy route and you would need expert advice which would cost a considerable sum in fees.
I would say that if you can afford it then buy it, maybe a long term investment, or maybe just a field to build a pump track on!