Whether stuff shows up in the 'future' or not, you never know what may happen to production, nor does the production crew (even if they were guaranteed a season 2, stuff could always change that.)
If a single season can't stand alone, then there is an issue in the writing.
It isn't like season 1 moved things along while suggesting or showing 'more'
Season 1 ended in the middle of the plot it setup for season 1. It's plotted poorly.