Here's a curve ball to think about :
With the rail link being given the go ahead surely this is a massive incentive to own the ground ,the accessibility from surrounding areas will be greatly improved encouraging a larger catchment area, also direct link to the city centre which can only improve match day and comercial event day experience more people not coming by car , = more people using the casino , drinking making it more of a cash cow . What ever they pay for the arena now can only be worth more when the rail link is active , I still think they are more interested than they will ever let on