Kind of far-fetched.
Might work out like that, but not at the time.
Tucker Carlson, Sean Hannity, and numerous Fox News commentators have talked about the threatened indictment of Flynn's son many times.
Bottom Line....
Flynn barely knew Trump.
Also - from memory - Lt. General Flynn got his third star from Barack Obama, and Obama appointed Flynn to be Director of the Defense Intelligence Agency.
Why would Flynn plead guilty to a felony he did not commit to save Trump?