The subpeonas are much ado about not much. One of the things they're going to look at is the baseless allegations about a pump and dump. What was said at the time about results from the EINDs was true no pump there and Nader had a narrow company approved timeline to sell shares. If there was a pump and dump he would have waited until the last minute on the pump side before selling rather than selling right before payment to Samsung was due.
If you look at the pump and dump they need to look and see how many shares Andrew Left bought to increase the share price before he dumped those shares and sold his short shares.
The other thing they're going to look at is misrepresentations made by Nader. That would be non-criminal and the few that might have been made would involve a small fine from the SEC.