This attraction was announced in mid-2017. It's horribly delayed, years behind any reasonable schedule, and Gunn is absolutely not the reason.
I honestly do not understand folks who knew WDW 10 years ago (let alone 20 years ago) and not notice that something is very wrong in the parks. I spent a significant amount of time in each park last year. Overall, MK and EPCOT are not pleasant experiences, despite the fact that each still hosts a plethora of classic attractions. AK and MGM have obvious problems, but they can still offer guests a very enjoyable time.