However, the film series itself is described as "a collection of related films in succession that share the same fictional universe, or are marketed as a series".
But as everybody knows, The Lord of the Rings and The Hobbit share the same universe. So, from my point of view, it will be more correct to refer to them as one big series, divided into two smaller ones.
Is this a correct assumption?
(I'm not a big fan of LotR movies itself. My interest is about film series (aka film franchises) in general. The logical system of how they divided/subdivided.)