Not really surprised.
We heard for years that the remake would take them far too long to develop when you consider modern videogame development compared to development of 20 years ago. 3 discs, 3 parts to the story. Means they can get something out for 2017 to celebrate the 20th anniversary and continue to bring out new parts of the saga almost annually.
If they fit the entirety of Disc 1 into one episode, I will be really impressed. For people who have never played the game too, the ending to Disc 1 will be something absolutely fucking huge for them to be left with in anticipation for Disc 2.