Do they come back at the same strength? What about all the lost business in between those points? Do they just recover... or actually compare that to a situation where you never turned customers off to start with?
And besides, this isn't a sports team that is a passion who also have a monopoly on the sport in the area. This is a SHOPPING CENTER... where there is actual competition and alternatives. Do you really want to goto DTD to get to that one restaurant, or will you instead opt for this other one without all the baggage? You **** people off, they hold it against you. They won't magically all forgive when the new stuff opens. Especially when Disney is going to do this prolonged drawn out opening thing meaning you lose that punch to tell people 'hey, things are different now'. Instead they will have to slowly fight back against those perceptions built and hope that bad blood people are holding onto fades.
But to the point of the original post - it will cause scars and negative baggage that won't simply disappear... especially if Disney can't slow a clear delineation between 'old' and 'new'. They will have to fight to change the perceptions that have been built up over years.