Due to the complete lack of plot details, character information, or thematic descriptions for 'Merv, 2023', it is not possible to assess the presence or portrayal of LGBTQ+ characters and themes. Therefore, an accurate evaluation of its net impact cannot be made.

There is insufficient information available to assess the film's portrayal of transsexual characters or themes. No plot details or character descriptions related to transgender identity were provided to determine any depiction.

The movie does not contain any action or adventure elements.

Without information on the film's source material, character origins, or whether it's an adaptation or reboot, it's impossible to determine if any character's gender deviates from a pre-established canon.

The film "Merv, 2023" is presented without any details regarding source material, prior adaptations, or historical figures. Consequently, there is no established canonical or historical racial baseline for its characters to compare against the on-screen portrayals, making it impossible to determine if a race swap occurred.