Without spoiling anything I think season 1 ended as planned and they set themselves up for a few different options in season 2. I don't think they'll have to scrap anything, but I do think they'll adjust the plans for Hal Jordan (older guy) based on his reception.

I understand being unhappy with the ending. The show is fast paced and it could have used a little more room to breathe. I liked what happened (from a story perspective), but I understand why someone might not.