The city of Philadelphia was reportedly very close to landing WWE’s WrestleMania 31 but the main reason they didn’t is because of the way they approached the bidding process.
WWE felt like Bay Area officials were more inviting and wanted them to be there. Philadelphia officials approached the situation like they were doing WWE a favor by having WWE in their city.
It’s said that Philadelphia cost themselves WrestleMania due to their lack of interest. When it came time for various cities to push themselves to WWE, Philadelphia just didn’t get the job done like the Bay Area and other cities did.(Source: PWInsider)
UPDATE: WWE has issued PWMania.com a statement confirming the report above is untrue.