The provided information for 'Rhumba Land' does not indicate the presence of any identifiable LGBTQ+ characters or themes, leading to a net impact assessment of N/A.

This short musical film does not feature any identifiable transsexual characters or themes. The narrative focuses on musical performances and comedic situations without engaging with transgender identity.

The movie does not contain any action or adventure elements.

Rhumba Land (1939) is an original musical short film featuring musicians and dancers. It is not an adaptation of existing material with pre-established characters, nor does it depict historical figures. Therefore, no characters undergo a gender swap from prior canon or history.

No information is provided about source material or pre-existing characters for the 1939 film "Rhumba Land." Without prior canonical or historical character baselines, a race swap cannot be identified according to the given definition.