On what grounds is the JR being sought?
AFAIK, it can only be brought on the grounds of illegality, irrationality or procedural unfairness and not to re-argue the merits of the development. So it normally depends on whether the SoS has misinterpreted policy, not considered the environmental effects or the process itself was unfair. Just reaching a different decision to the Planning Inspector isn’t sufficient grounds.
Even the LHR JR didn’t reverse the decision, just found that the SoS hadn’t properly considered the environmental impact and would need to do so. Only after reconsidering that impact could the decision be reconfirmed or changed - not the JR itself.