More and more I think the original leak a year or so back about it just being SP only is true. People just found this in the game files post-update in MW and it specifically says: "Campaign Remastered" not just: "MW2 Remastered"
Yeah, I don't think MP is coming. Between MW (2019) base, Warzone, and CoD 2020, I don't think they want to split the playerbase up more.