First off I don't know if this is something that is 100% true and don't want to start any rumors, but I was looking at interviews and found one from Jace Norman stating that the just finished season 2 of Henry Danger. Here's the interview
If this is true season 2 will have at least 12-13 episodes out of the 20 that were ordered. However, Dan could of decided to split the season in half like he has done with iCarly and Victorious. We know something is not right due to some recent pics that were found. We will keep everyone updated as the next few weeks unfold.