I have not heard of anything regarding this yet and to be quite honest they do not always tell us when they release patches. This is now the weekend so McAfee staff on these forums may be scarce till Monday but maybe someone will chime in to give an update.
McAfee Volunteer Moderator
The engine is already there.
Most likely it will be the new EPS 10 that will support Win10 but that is just my guess.
Both products however have no set date of release to the world yet so...
Best start testing the engine already I would say
EoL info about the Engine:
We won't comment on Win10 until we get access to the RTM version - until then we won't even know what the scope of work is.