Without any provided plot details or character descriptions for the film '{今天不上课}', it is impossible to evaluate the presence or portrayal of LGBTQ+ characters and themes. Therefore, the net impact is rated as N/A due to a lack of information.

No information regarding the plot or characters of the film '{2 x 2}' was available, therefore an assessment of its portrayal of transsexual characters and themes cannot be made. The net impact is determined to be N/A due to the absence of content for evaluation.

The movie does not contain any action or adventure elements.

The film "今天不上课" (1972) is presented without any specified source material, prior adaptations, or historical figures. Without a pre-existing canon or historical record to compare against, it is not possible to identify any character as having undergone a gender swap.

Without information regarding the source material, specific characters, or their established racial identities prior to the 1972 film "今天不上课," it is not possible to identify any instances of a race swap according to the provided definition.