If approved, Newark and Sherwood District Council's leader says work is expected to finish by 2028.
Two people were reportedly seen carrying fuel cans to a large tank of kerosene, the force says.
Motorists will be unable to use the A614 Old Rufford Road while "essential repairs" are carried out.
The crossing near Ollerton was closed in 2022 due to safety concerns from Nottinghamshire Police.
The man could have survived had he been given the correct antibiotics, a report finds.
The proposed development includes a three-screen cinema, cafe, public sector hub and housing.
The armoured vehicle, used by local units, is to be a "gate guardian" outside the entrance.
Mark Tems has admitted to stealing more than £25,000 from an elderly man that he knew.
Two people are arrested, including the man who sustained a gunshot injury and was taken to hospital.
