This story by Jim Hill is pretty ridiculous actually. Sorry, but it is.
IF, and I say if, they decide to rebuild that bridge, they will do so very very quickly. They would do it during a slow time of year and just have no parade for the time it took to rebuild. Disney oves to skimp on labor, and what better labor savings than to not pay 200 performers.
This is a major thoroughfare in the park that cannot be closed for an extended period of time. As big an issue as the parade? Having enough walking space for thousands of guests daily. As much as they have to close the castle off, you HAVE to have this bridge walkway open to traffic.