The stadium IS ready to go, minus the roof issue.
Funnily enough that's a rather big issue and it's one that could've been predicted. The magnitude was similar by most predictions to Rita which caused the same damage as Ike has, sitting and hoping that this wouldn't happen again is dumb. I don't care what the local authorities in Houston said, the NFL has a bunch of smart people in their organisation, if no-one there saw this coming when 90% of other people did then, well that doesn't say very much for them does it.