It seems possible that Samsung will resurrect the Galaxy R brand-name to include what many believed was going to be the Samsung Galaxy A90. According to a well-known industry leaker, the Samsung model SM-A90X will likely be part of a new Galaxy R series that would feature premium midrange smartphones.
https://www.notebookcheck.net/Wave-goodbye-to-the-Samsung-Galaxy-A90-and-say-hello-to-the-Samsung-Galaxy-R-series.425027.0.html