It was the graffiti that made the abandoned skyscrapers of Oceanwide Plaza in downtown Los Angeles infamous. But the illicit work is low on the list of problems facing the bankrupt, billion-dollar development. With a potential fire sale of the residential, hotel and retail project approaching, a far more complex and expensive question looms over one of the region’s all-time real estate catastrophes: Can it be saved from the wrecking ball? The fastest path forward for a new owner would be to complete the original plans for the three-tower development that ground to a halt in 2019 and stands abo…