On a recent edition of Wrestling Observer Radio, Dave Meltzer speculated that it’s possible to see a three-way match at SummerSlam between Brock Lesnar, Roman Reigns and Samoa Joe. There was even a speculation of having a fatal four way match as was previously reported. But as things stand right now, the three way match is the direction that WWE is more likely to go as it would save the Reigns/Lesnar match for WrestleMania. The triple threat would allow a number of different creative finishes and possibilities.
Meltzer suggested that the reason WWE may be wanting to get the title off of Lesnar is because he’s rarely on TV and they would prefer to have the champion who is consistently present and visible.
With that said, the latest plan is for Samoa Joe to win the Universal Title at SummerSlam, then defend it regularly until a later PPV such as Royal Rumble, and then drop it back to Lesnar who would go onto face Reigns at WrestleMania 34.
Source: Wrestling Observer Radio