Toys, figures and clothing for a film or series frequently appear in shops before anyone has seen it, sometimes revealing characters and designs. The sequence is dictated by manufacturing time rather than by marketing choice.
Physical production runs on a long lead
Designing, tooling, manufacturing and shipping a product takes many months. Retailers plan shelf space further ahead still.
To be in shops at release, a product has to be finalised long before the work it depicts is finished.
The designers are therefore working from early concept material rather than from anything final, which is why merchandise sometimes shows versions that do not appear in the finished work.
Retail commitments are made even earlier
Shelf allocation for a major release is negotiated well in advance, and those commitments are difficult to move once made.
A retailer holding space for a season needs product on a fixed date, independent of whether the release schedule shifts.
When a film moves and the merchandise does not, the products arrive first. This has become common enough that audiences expect it.
The revenue is not a side effect
For several categories of production, licensed products contribute a substantial share of total earnings, sometimes rivalling the release itself.
That makes the merchandise schedule a primary consideration rather than a secondary one, and it is planned alongside the production rather than after it.
Where the two conflict, the manufacturing calendar is generally the harder constraint, because factories and shipping cannot be compressed.
Secrecy and supply chains are incompatible
Keeping a plot detail hidden requires that nobody outside a small group knows it. Making a product requires designers, factories, shippers and retailers to know.
Productions manage this with placeholder names and withheld context, which limits leaks without eliminating them.
A figure of a character nobody recognises is itself information, and audiences have become skilled at reading exactly this kind of evidence.
What it does to how stories are told
Designs that support products are favoured at the concept stage, which means distinctive silhouettes, clear colours and characters that read at small scale.
These are reasonable design principles in their own right, and they are also commercial requirements arriving early in the creative process.
The influence is real and hard to isolate, because a good character design and a sellable one look very similar from outside. Nobody has to be instructed to design toward a product; the constraint is simply present in the room.