Blimey, remind me not to get you in as a valuation agent.
I hate to shoot you down here, but you're just using ACL's figures based on the revenue you think they may receive from the club. ACL themselves claim a lot more than that as revenue, and show more both in their past books and presumably their future projections.
Even then, if you're just going to use ACL revenue as a valuation for the freehold, then you only get the freehold for the bit that ACL sit in. All of that other land, ready for development, and the casino etc., that's not included in your valuation by definition. How much are you going to value that at?
And that's before you even get to the question of whether the council want to sell at the 'bottom of the cycle', to use Tim's words. SISU wouldn't, so why should CCC? It could be that if ACL is profitable, there's no commercial need to sell at all, in which case a buyer might need to go far beyond a simple commercial valuation in order to secure a purchase. In addition the council have a statutory legal duty to get the best possible return for any assets they sell, so even if they wanted to do a deal, they'd be obliged to consider all avenues before selling to SISU.
As I've said before, if you want to know the true market value of something, the best thing to do is put it on the market.
(As an aside, even if you buy the freehold, you still get ACL as a sitting tenant with a 40+ year lease. You can't just break that lease, no matter what TF says. And the Council, even if they wanted to, do not have the power to 'liquidate' ACL. The only quick way back to the Ricoh, imho, is via a rental deal. Anything else is going to take a long time to sort out.)