There has to be more. That thing that guy said at the end about this is just getting started or something.
You do know that means nothing right? 10,000 anime could have "to be continued" but if they don't sell well the company won't make more.
Anime is a business and money is everything. Why spend money on making something that won't profit? If you didn't know this common fact now you do.
However Freezing seems to have sold well in Japan so there's a good chance there will be a season 2 eventually (there is enough manga material now).
Personally I think it might be a good idea for the Japanese to make an OVA series of Freezing: First Chronicle and Freezing: Zero first (backstorys of Chiffon Fairchild and Kazuya's Sister)
There's some important info in those manga series which is later mentioned in the main series.
Then they can make a season 2.