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

Calculating dependencies ... done!
Dependency resolution took 0.99 s (backtrack: 0/20).

[ebuild  N     ] net-libs/libnfnetlink-1.0.2::gentoo  USE="-verify-sig" 292 KiB
[ebuild  N     ] net-libs/libnetfilter_conntrack-1.1.1::gentoo  USE="-verify-sig" 307 KiB
[ebuild  N     ] net-libs/libnetfilter_queue-1.0.5-r1::gentoo  USE="-doc -static-libs -verify-sig" 307 KiB
[ebuild  N     ] net-libs/libnetfilter_cthelper-1.0.1-r1::gentoo  USE="-verify-sig" 285 KiB
[ebuild  N     ] net-libs/libnetfilter_cttimeout-1.0.1::gentoo  USE="-verify-sig" 286 KiB
[ebuild  N     ] net-firewall/conntrack-tools-1.4.8-r1::gentoo  USE="cthelper cttimeout -doc (-systemd) -verify-sig" 443 KiB

Total: 6 packages (6 new), Size of downloads: 1918 KiB