Pete Dunne (from NXT UK to Raw)

After more than a 600-day title reign, Pete Dunne is no longer UK Champion. Now that he has lost the championship, it makes no sense for him to spend any more time in NXT UK. The UK brand has grown to the point that they do not need him anymore so Pete Dunne should definitely be headed to the main roster. He should go to Monday Night Raw where he can face off with the likes of Seth Rollins and Roman Reigns.
EC3 (from an Unassigned Brand to Monday Night Raw)

Did you know a top WWE Superstar just wrestled outside the company? More details HERE
EC3 has arguably floundered since making his main roster debut. However, he has the chance to be a star in WWE and will likely be given more of a chance after the Superstar Shakeup. He should arguably go to Raw where there will be more time for him to deliver promos. This allows him to face superstars like Seth Rollins and Roman Reigns.