It's very reminiscent of what was done at Long Eaton as well. The 'save the stadium' campaign was strong, but obviously with speedway fans being more regionalised and stock car fans following drivers rather than locations, the speedway side was far stronger.
When the developers were not making any progress, they came up with a new plan which would rotate the track through 90 degrees, freeing up land that could be developed for industrial purposes. This development would generate the funds for the new track.
Of course, this was never going to happen, but unfortunately the leaders of the campaign group were speedway fans and they bought the lies. Obviously, without pit space there was never going to be any stock cars there again, so a wedge was immediately driven between the two factions as the stock car fans felt like they were being sold out.
This 'new speedway track' at Brandon will have exactly the same effect on the campaign groups at Coventry if the speedway side show any signs of weakness towards it. There is no way that a new stadium could survive purely on income from speedway and the developers know this.