No, you out right wrong.
They have added and subtracted classes and races from the PHB throughout varous editions. 4e added the Warlord, 5e took it out. 5e added the Drow to the PHB for the first time ever. One addition removed monks others added them back in. 4e added Warlocks, and 5e keep them. 4e took out Half Orcs and Gnomes while adding Dragonborn and Tieflings and Eladarin. 5e readded Half Orcs and Gnomes, kept Tieflings and Dragonborn, and pushed a prototype of Eladarin to the DMG (along with Aasimar), only to release finished versions later.
You have no idea what WotC will or won't do, and that you don't find my reasoning compelling enough matters not at all, given that not only is it not up to you, but you made no counter arguement to it.