Kalisto
The Diminutive Dynamo had a singles run last year as US Champion, and during his title reign the belt suffered like never before. In competition against larger guys, his performance was lackluster and it became a repeat of the giant-killer gimmick every time he stepped into the ring.
Be it against Ryback or Del Rio, his reign was so forgettable that US Championship matches were relegated to the pre-show of most Pay-Per-Views. However, he had a match with Neville on Smackdown, earlier this year, which was far, far, better.
The new Cruiserweight Division on Raw will also need stars bigger than Kota Ibushi and Gran Metalik, and who better to lead the division than a former US champion? And if Neville and Kalisto can recreate their chemistry...nothing like it! Definitely a better plan for him, than a feud with Baron Corbin.