#3 Should happen at SummerSlam - Apollo Crews vs MVP
Now, this completely depends on whether Apollo Crews can be cleared to compete at SummerSlam or not. MVP was set to challenge the United States Champion Apollo at "The Horrorshow at Extreme Rules" last month, but due to the latter testing positive for COVID-19, the match never happened. Interestingly, MVP went ahead and crowned himself the "real" United States Champion, with a new title belt.
If Apollo recovers in time, WWE could book a match between him and MVP at SummerSlam to determine the undisputed United States champion. It is up for debate as to which title will become official going forward!
#3 Should not happen at SummerSlam - MVP vs Bobby Lashley
In case Apollo Crews doesn't make it up by SummerSlam, WWE might be tempted to book Bobby Lashley to turn on MVP and book the two of them for the United States Championship at SummerSlam. But they should not pull the trigger on the group so soon. MVP has been doing a stellar job as Lashley's manager and the pairing, along with Shelton Benjamin, has so much potential.
WWE might go ahead and book a tag team match between The Hurt Business and three other Superstars as a backup if Apollo can't make it to SummerSlam. But Lashley and MVP should stick together for now.