Why releasing the games in episodes is a good idea
Instead of releasing everything at the same time. The best idea is like 2 weeks between the episodes, the waiting used to be too much in past Telltale games.
And why is it a good idea? Of course, there is the fact that it gives more discussions and predictions among fans. But besides that, this is a good idea from a marketing standpoint. Basically if you release everything at the same time, once it is out, in a few weeks everything is done. The marketing and hype wont stay for that long. However if you release in episodes you always can release trailers and basically promote the game more. The hype remains for a bigger period of time.