There is no major motion picture titled "Sheepwell" released or announced for 2026. It appears you may be conflating two distinct works found in recent entertainment records: the film The Sheep Detectives (also known as Three Bags Full) and the novel The Well.
As of the latest available data, there are no production details, cast lists, or release dates for a movie specifically called "Sheepwell." Any information regarding this specific title would be fabricated.
No streaming, rental, or theatrical platforms list a movie titled "Sheepwell" because it does not exist.