I received the following from a reliable source when I asked if they knew anything re: the status of Hell's Kitchen's return.
"It got pushed back because of Fox's commitment to WWE. I would have presumed that they originally intended it to start in June like it has done numerous times, giving them an easy "summer schedule". But with shows on hiatus completely at present, and no idea when the scripted stuff will return, I would now expect that they'll air it in September or October to give them a start of the "main" TV season. It'll be on the Calendar as soon as there is definite data."