Infinity Ward shared a blog post announcing that Ronin is the latest Operator. An ex-Special Forces Operative and master of multiple fighting systems, he can be purchased through the in-game store and is deployable in both Modern Warfare and Warzone.
Also purchasable in the in-game store and usable across both Modern Warfare and Warzone are the Fool's Gold II and Toxic Ooze weapon bundles. They include legendary weapon blueprints, a calling card, emblems and sprays, and more. You can check out two blueprints--"Deep Pockets" and "Sludge"--below.