F2FS is a flash optimized filesystem, needs to be supported in WIC and IMAGE_FSTYPES.
This has both a Kernel component and User-space, F2FS is already in meta-filesystems, the question is does it need to move to oe-core?
Currently, when IMAGE_FSTYPES has f2fs, bitbake fails with: No IMAGE_CMD defined for IMAGE_FSTYPES entry 'f2fs'.
It looks to me like this did get added at least to IMAGE_FSTYPES: http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=c44980abaf4ef3756597c0c5b51678253a56a5f5 (Note that you still need the meta-filesystems layer in your configuration in order to provide the required f2fs-tools recipe.)
F2FS support in IMAGE_FSTYPES is available and build is successful and produces *.rootfs.f2fs image.
As per comments, closing.