Merchandising is often treated as a consequence of a successful property. In practice it is assessed before production begins, and the assessment influences what is made and how it looks.
Licensing income can dwarf ticket income
A studio takes only a portion of a cinema ticket, while licensing agreements deliver a share of retail sales across toys, clothing, publishing and games.
Those categories continue selling for years after a film has left cinemas, and they do so without further production spending.
For properties aimed at families the licensing side can be the larger business, which makes it a legitimate input at the point where projects are chosen.
Manufacturing needs answers years ahead
Toys and packaging require lead times measured in many months, so licensees need character designs long before the film is finished.
That forces design decisions to be locked early, and it makes late creative changes expensive in a way that extends well beyond the production.
It also means partners see material early and give feedback, which is a form of influence exercised before anything has been shown to an audience.
Designs are built to survive simplification
A character has to remain recognisable when reproduced small, in few colours, and without any of the lighting or motion the film provides.
This favours strong silhouettes, distinct colour blocks and simple identifying features, which is why so many designs read clearly in outline.
Characters that depend on subtle detail translate poorly, and that consideration reaches designers as a practical requirement rather than an aesthetic preference.
Some stories are structurally harder to license
Properties with clear factions, vehicles, creatures and collectable variety generate large product ranges, while intimate stories generate very little.
This does not prevent such films being made, but it changes how they are financed and how much a studio can afford to spend.
The effect is felt most at the largest budgets, where the merchandising side may be the difference between a project being viable and not.
The influence has limits
Product ranges built around films that audiences reject sell badly, and licensees carry that loss, which makes them cautious about being led by projections.
Studios have also found that heavy merchandising can damage a property's credibility with older audiences, who read it as a signal about intent.
The balance now tends toward assessing licensing potential early while resisting design decisions that would be visible on screen as compromises.