Jarek - No. I like Jarek, but there is no justifiable reason. His moveset/fatalities are all recycled. His design is OK in MK4 and in MKA, it's awful. He got new moves in MKA, but they were bland. He has no story potential whatsoever.
Sheeva - No. I loved Sheeva pre-MK9. She had an interesting story, a rivalry with Motaro and a great conclusion that ended in her death because of Kano's betrayal. In MK9, they made it clear they do not care for her at all and did absolutely nothing with her. She was easily the most ignored characters in the game (even behind the DLC, who all got vignettes, etc.).
Smoke - No. I do want him back in a future game, even though I don't like him at all. He has very interesting moves, plenty of fans and potential. I would love to see what else they can do with him. I just don't want anymore dead MK9 characters returning alive so soon.