Running changes are common in the RV industry. Also common are discontinuation of models not selling well, introduction of new models, and special models at the end of the season. Models actually offered will often not match brochure descriptions because the brochures are usually produced by the sales department well ahead of production, and the engineering or manufacturing departments might decide to do something different.
For a dealer to rebadge a vehicle to a new model year would require counterfeiting the finished vehicle VIN and specification tag.
I don't know that it is logically possible for the manufacturer to rebadge to a new model year, as the model year is whatever the manufacturer says it is. In the RV industry, model year might be almost a year beyond date of production, e.g. manufacturers will be producing some examples of 2018 models for the RVIA Trade Show in late 2016, and production of 2018 models for sale could start as early as January 2017 at some manufacturers. Most will be well into production and shipment of 2018 models by March 2017.
