As was the case last year. the players most likely to be dealt or released are the ones on expiring contracts. That would be Familia, Cabrera, Bautista, Mesoraco, Blevins, and Reyes. Familia would bring back a return comparable to Addison Reed last year - three midlevel prospects. Cabrera would be like Neil Walker - one midlevel prospect. Maybe Mesoraco brings back a midlevel prospect as well. That's about it.
I can definitely see Wheeler and Flores being traded. Both are free agents after 2019, and neither is in the club's long term plans. However, neither will bring much in return.
Cannot see Mets trading Lugo. Contending teams want guys with track records, which he doesn't have. No way he will bring back fair value. IMHO he's the type of guy you keep and build around.