Here's a controversial but unapologetically asserted thesis: all great fiction (franchises) require great metaphysics!
Metaphysics can be seen in at least two ways (perhaps merely two facets of the same thing rather than two distinct and mutually exclusive natures):
Clearly, the second thesis is a weaker notion than the first.
If we accept traditional philosophical critiques of the discipline called Metaphysics, we would think that we can't ascend from the second thesis to the first!
Now for some hard arguments and data points!
There it is, the sum totality of all great fiction. And every one of the great works of fiction carries within them all the makings of High and Great Metaphysics!
I contend that Metaphysics is what makes them fun and elevates above the banal (transforms those works from mere fiction into high fantasy or science fiction)!
Perhaps instead of less Metaphysics, we need more of it! (More great franchises please!)
And, if you accept my further argument that games (of one variety or another) are what most people value the most highly in their lives (fanatical football tailgaters, competitive esports, toys, board games, sports, golf tournaments, reality television, The Olympics, etc.), it follows that Metaphysics is the highest of all forms of recreation (since it is part and parcel within all the highest games)! People "live for" their games and franchises! It's undeniable.
I rest my case.