My prediction as of now is that Cashman will finally cave and give up Mateo (SD supposedly wants a SS), he's years away and Gregorius has really seemed to blossom in recent months and is only 25. Judge and Bird I get not wanting to move no matter what, as they are the obvious fill-ins for Beltran and Teixeira respectively, but Mateo is farther away (still in low A) and maybe not as essential given Didi's emergence. Plus they have all of those potential SSs they signed in the international period last year, those guys can't be too far behind Mateo, I guess.
So in exchange for a package led by Mateo along with some B prospects, NY gets Ross and Kimbrel, leaving them with a current pitching staff along these lines:
Tanaka
Eovaldi
Ross
Nova
Sabathia or Warren or Mitchell (Pineda once he returns)
Moreno
Mitchell or Warren
Shreve
Wilson
Betances
Miller
Kimbrel
That is one crazy bullpen, to go along with a very unsure rotation. However, I'm pretty sure everyone there is under control for 2016, so if you add Severino to that batch (Tanaka/Pineda/Ross/Eovaldi/Severino/Nova), you have a potentially better situation next year as well as the ability to let Nova leave in FA after 2016 if they want.
The question of how to handle the Sabathia situation continues to loom over this team, it's amazing they've been as successful as they have with him still in the rotation every five days.