One of these cases will hit the right chords and then out of office goes ZERO!
I kind of doubt it. The other day Obama/Biden filed a motion to dismiss. It wasn't very long, but in reading it I got the impression that the lawyers who filed it were quite skilled. In comparison most of the anti-Obama filings seem like amateur hour.
To really get a judge to issue a subpoena that will take effect on a sitting president, you would need high-power professional legal representation. A really high-quality lawyer has to take the case. But most lawyers are probably going to feel they will be risking their career. Perhaps if there is some big money paying for the case someone would take it. But there don't seem to be any very wealthy people who are bankrolling this either.
Another factor is that no one can state for certain that Obama's long-form BC is disqualifying. Without knowing in advance what it says, individuals are not going to risk a whole lot of their own money just to see a piece of paper.