Will expire later this year - Rusev and Lana

'The Bulgarian Brute' last appeared at Super Showdown but he hasn't appeared in WWE since 'Mania. At the Show of Shows, he challenged for the SmackDown Tag Team Titles alongside Shinsuke Nakamura. After failing in their bid to capture the belts, he allegedly asked for time off. His current deal is set to expire soon according to the Wrestling Observer.
Rusev was one of the most over stars last Summer, even earning a WWE Championship shot against AJ Styles at Money in the Bank. He failed in his attempt to become WWE Champion. He would also be unsuccessful in a bid to win the SmackDown Tag Team titles alongside Aiden English.
Did you know a top WWE Superstar just wrestled outside the company? More details HERE
He was still over as a face and the crowd still chanted 'Rusev Day' as he captured the US Championship to close 2018. After a strange feud with Nakamura that almost led to the Japanese Superstar nearly injuring 'the Ravishing Russian', the two men joined forces as a tag team. Lana's deal coincides with the Bulgarian Brute's, so it could be a two-person loss for WWE if they decide not to use either Lana or Rusev.