Watcha wanna bet he was keeping an eye on things for old KGB in Russia?
Dates are important. So there's hit pieces like this, that have been out there for quite some time, that are going to make the case that Flynn had been in contact with Russians long before the investigation began. I would expect these stories to resurface:
https://www.theguardian.com/us-news/2018/dec/04/michael-flynn-timeline-former-national-security-adviser-trump
April 2016
In the final seven months of the presidential campaign, Flynn and other aides will hold 18 phone and email conversations with Russian operatives, Reuters reports.
Vaguely worded, sure. Here's the Rueters link:
https://www.reuters.com/article/us-usa-trump-russia-contacts/exclusive-trump-campaign-had-at-least-18-undisclosed-contacts-with-russians-sources-idUSKCN18E106
Exclusive: Trump campaign had at least 18 undisclosed contacts with Russians: sources
The 18 calls and electronic messages took place between April and November 2016 as hackers engaged in what U.S. intelligence concluded in January was part of a Kremlin campaign to discredit the vote and influence the outcome of the election in favor of Trump over his Democratic challenger, former secretary of state Hillary Clinton.
So, be ready. There's already ammo out there, on their side of this.