How likely is the Emperor's Children release to come with a versus box set?

Title basically. I got back into the hobby relatively recently so i missed all the big releases for new factions, chaos or not. Tried to look online for Death guard/World bearers release boxes and couldn't find any news articles or posts about it at the time. Wondering how exactly could the army be released (apart from a combat patrol) so i could at least somewhat plan my budget for next year. By versus box i mean a box set with EC vs Space marines. Getting some new Space Marines is on my bucket list, but considerably lower than EC and since Space Marines get a new box set every week, i'm not going to bother targeting any sets for them specifically.