Holy Premature Demolition Batman!
After ABC canceled the original Batman TV series (1966 - 1968) which starred Adam West (Batman) and Burt Ward (Robin), the producers waited to see if anyone else would pick it up, then bulldozed the Batcave set when it appeared nobody would. Two weeks later, NBC offered to pick it up, unaware that the set had already been dismantled; unwilling to invest in the high cost of rebuilding the entire set, NBC ultimately declined to acquire the series.
" I'm just going to hang around the bar. I don't want to look conspicuous. " - Batman