These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 0.97 s (backtrack: 0/20).

[ebuild  N     ] net-libs/libnfnetlink-1.0.2::gentoo  USE="-verify-sig" 292 KiB
[ebuild  N     ] net-libs/libnetfilter_conntrack-1.1.0::gentoo  USE="-verify-sig" 333 KiB

Total: 2 packages (2 new), Size of downloads: 625 KiB