That would make plenty of sense to avoid direct competition between I/Z and S/K until the last minute possible because everyone is going to be watching to see which couple comes out on top.
No doubt, especially with all the success she's had with D/W and V/M these past many years. And D/W just announced that they are not competing next season, just as expected pretty much.
Naturally Marina is not going to say anything negative about her skaters, but she better be ready to put her money where her mouth is if she's going to continue saying such bombastic comments about S/K ("fastest couple", "best male dancer"). Realistically S/K have quite a ways to go to reach the level of V/M and D/W, but she's making S/K sound as if they are already legions better than the couples that have been world and olympic champions for many years.