That’s a bit unbalanced. There’s a big empty space behind the M3 that needs filled by something, where the Yonko are in the other two pictures.
And if Yamato gets put in 101, then it’s a bit more symmetrical between 99 and 101.
Although I suppose Chopper and Usopp are kind of sharing the one space, which would be parallel to where Nami goes, so it wouldn’t look too bad without Yamato...
If she’s not in any of these volumes covers it’s not a great sign for her being a potential Strawhat, by the way. Franky got put in the W7 Strawhat groupshot, and Jinbei was included in every Strawhat volume cover (when he was in the story) from Fishman Island onwards.