Telltale Games has confirmed that the fifth episode for Minecraft: Story Mode, Order Up!, will be released March 29th for PS4, Xbox One, PC, PS3, Xbox 360, iOS, and Android. The studio also confirmed that an extra three episodes will be released, which will be add ons to the the current seasons. These episodes will be under the title Adventures of the New Order of the Stone, and will see Jesse and co entering new worlds.
Telltale is keeping details on those new episodes under wraps for now. However you will have to pay for those additional episodes as they will not be included in the Season Pass. There is no date or price for these episodes either.
Source: Telltale