Would you exercise them?
Of course, exercising an ISO causes current AMT income, so there's probably a current tax year obligation. (That should eventually get resolved). And your stock is illiquid until an exit, which presents risks, of course.
Otherwise, stockholders have more rights than optionholders. Generally mergers and acquisitions need a vote of the shares, although you probably don't hold enough shares to matter, sometimes it's fun to vote. And you would be entitled to more disclosure as well.