Sorry for the double post, but maybe there is a (slight) chance this isn't for a cover. Lupita will probably get next month because of Black Panther's Oscar run, she has a movie out in March and Anna is not going to pass up the opportunity to give Lupita her yearly cover.
March is probably Brie Larson, April probably Ariana Grande (if the rumor is true) and since Lady Gaga just had a cover, May's Met cover is probably Serena's. Unless, maybe Lupita won't get a February cover after all? Is there enough lead time between now and when the February cover is announced/on stands for Hailey and Justin to get the February cover instead?