It is not possible to determine whether Pathaan will save or destroy Bollywood as it is a hypothetical question and there is no context provided about who or what Pathaan is. Bollywood is a large and complex industry, and the actions of one individual, even if they are powerful or influential, would not necessarily have the ability to significantly change its trajectory. Additionally, it is also important to consider that the success or failure of an industry is determined by a variety of factors, including audience demand, economic conditions, and technological advancements, among others, and cannot be attributed to a single person or entity.