You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
alternatehistory.com
Your challenge is to make the F-35 a modern military project success story preferably meeting it's promised capabilities preferably being a popular uncontroversial project that meets it's deadlines and fits it's requirements.
Just using a different aircraft and keeping the F-35 Lightning II name is cheating.