What is the possibility of one of Pyotr the Great's sons by Ekaterina I succeeding Pyotr II instead of Anna Ivanovna?
Pavel or Pyotr Petrovich (b. 1704 & 1705 respectively, both died in 1707) are the sons we're talking of, since his other 3 would all need a regency, and those never end well in Russia.
Secondly who would Pavel or Pyotr Jr (if they marry during their father or at least their mother's reign) marry? Or would they be left unwed until Pyotr II's reign and marry the daughters of the aristocracy?