Microtransactions in recent CoD titles have been by far the most controversial topic, particularly in Black Ops 4, as many players felt that the monetization model was aggressive, especially the supply drop or 'reserve' system which added exclusive weapons later in the game's life-cycle.
A leaker, who has correctly leaked Modern Warfare details in the past, including the addition of the 2v2 Gunfight mode, has now claimed that the "fair system" has been removed, in favor of a supply drop with weapons, and filler content such as emotes and sprays.
The Gaming Revolution claims "Who wants 300+ emotes in supply drops, who wants 500+ titles, who wants over 200 sprays in supply drops?" continuing, "weapons are coming too, forget any cosmetic only malarkey."
They haven't really dived into what MTX will be and contain in detail so this move turning out true wouldn't surprise me too much. It must have worked for them great with BLOPS4 even with all backslash it got from core gamers / fans.