Future Continuous is about an action in progress at a specific period of time in the future.
They will ___ __________ to Tokio at this time tomorrow.
be flying
no flying
to be flying
An Action that will be completed in the future refers to the Future Perfect Simple.
By this time tomorrow, I will ___ _____ the plane to Cancún.
had taken
have taken
have had taken
An action that will have started, will have continued for some time and won't be in progress in the future.
She will ______________ her homework for several hours.
have been doing
be doing
have been done
I will drive to work by this time tomorrow.
He will leave for Mexico tomorrow afternoon
The show will have ended by 7:00 p.m.
She will have gone to bed by the time we get back.
