RAW Tag Team titles - The Viking Raiders
The tag team titles in WWE aren't usually held for long runs. A shelf life of two to four months is the usual tag team title run in WWE. Seth Rollins and Buddy Murphy held the titles for a few months before losing them to the Street Profits in March. By that logic, it stands to reason that Erik and Ivar may recapture the gold before WWE SummerSlam.
The duos are immersed in a series of "Anything you can do, we can do better" events like basketball and ax throwing. They're building to another match for the gold at some point soon. With WWE Backlash the next PPV in June, it could happen there. But without the Authors of Pain, there are few other pairings on Monday nights. Andrade and Angel Garza will likely challenge for tag gold some time this year. Murphy may also be paired with Austin Theory now that the latter has joined the ranks of the Monday Night Messiah.
Shane Thorne and Brendan Vink are also lurking on WWE RAW but have not been established as viable challengers just yet. For that reason, the two teams to carry the division are the Street Profits and the Viking Raiders. Since it'll be coming up on a few months with Montez Ford and Angelo Dawkins as Champions, I expect Erik and Ivar to win the titles before or at WWE SummerSlam.