Source: The Wrestling Observer
Here are some additional notes on the WWE brand split:
WWE is planning to run dual-brand episodes of Monday night RAW just for the two big PPVs of the year. As of now, the dual-branded Monday shows will be for the night after SummerSlam and the night after WrestleMania.
WWE is also planning to feature double announce teams at PPVs, with the RAW and SmackDown announcers calling their own brand’s matches. This is similar to how things worked during the original WWE brand extension.