Some Freepers have proposed letting the judicial process run its course, but the process has been corrupted. Trump may have to pardon Flynn to keep Sullivan from harassing him any longer.
If this has not been settled with a dismissal by election day, win or lose President Trump will pardon Flynn the day after the November election. Flynn has been put through hell by the deep state (i.e. the swamp or the sewer, take your pick) and deserves his freedom.
It is not feasible for Trump to pardon Flynn.
The legal process the DS is attempting to avoid here requires a verdict exonerating Flynn which is what the dismissal will do. The pardon does not get him there.
He needs a conclusive verdict in order to support future litigation against the principals (Comey, Obama, McCabe, etc.). The charm in that litigation is that Flynn then can do discovery the open up everything on the Obama side of the table.
Reversal of the initial Court of Appeals decision would be unheard of--much like many other things that are happening. There is simply no meritorious argument here. The case has been dismissed by one of the parties which has the absolute power to dismiss the case.