While WWE Superstars Roman Reigns and Elias may be on the SmackDown! Live brand these days, they are both being advertised for a handicap match on RAW next month. According to the STAPLES Center in Los Angeles, Roman Reigns vs. Shane McMahon & Elias is being advertised for the June 17th RAW TV taping.
Of course, the card is subject to change and advertised WWE live events matches so far out (especially these days) are more than likely to change or will be dark matches.
It should also be noted that Reigns is advertised by WWE for the Palm Springs, California SmackDown! Live event that same night. The STAPLES Center has a newer listing, though.