A dismissal is a dismissal. If TM wins then the court rules against you, your shares are "invalid". You then go to brokerman and say replace these! He says uh, I had no way of knowing. You say I'll drag you into court! He says uh you ever read your brokerage agreement? You say, not closely. He says you have to go to arbitration as per your signature.
If TM loses and they all get dismissed, except for some of the ones who have fake certs. Your dimissal is no different than one that get's dismissed by challenging jurisdiction. And we're back to square one.
If some challenge for jurisdiction and the judge dismisses, but those who answered go forward to court. What will you do then?
If we go through all of this and it is all dismissed we should in fact create a group of investors and then go to group arbitration against the brokers, because TM will have exhuasted ALL HIS ANGLES imo.
All of this is IMO only and is not legal advise.