From Dark Horizons:
After New Line Cinema’s anime feature “The Lord of the Rings: The War of the Rohirrim” debuted to a disastrously low $4.5 million in its opening weekend in cinemas on December 13th, and then fell a steep 72% to just $1.25 million this past weekend, the title is being made available on digital at home on December 27th.
I didn't know it existed until I saw a poster for it in the cinema a couple of weeks ago. You'd think they would have actually spent more than a few pennies on marketing