how many generals and other ranks of the army will join Flynn in his support for a trump coup?

Trump has spent more than four years insulting military generals and heroes, whether they are alive or dead..

Just a few weeks ago Trump announced the US troops in Afghanistan and Syria would be home by Christmas. Did the generals obey him on this, they did not.

A poll published by The Military Times contained bad news for President Trump with his levels of support within the U.S. military waning. Between October 2016 and August 2020, the share of active-service members finding the president favorable has fallen from 46.1 percent to 37.8 percent. With the election swiftly approaching, 37.4 percent of active-duty troops said they would vote for Donald Trump while 41.3 percent would opt for Joe Biden.

Now you think they will back Trump's coup, this is even crazier than when you thought the Supreme Court would sanction Trump's coup.

Zero

I hear there is a possibility of recalling Flynn to Active Duty and Court Martialing him

As of 12/18/2020 that looks like a non-starter.

NONE -  Flynn is an idiot.

the "coup" has already taken place with the stolen election, the cancel culture with the big tech giants, etc. I hope and pray the majority of the military big shots are conservative and will join Flynn.