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

Calculating dependencies ... done!
Dependency resolution took 1.05 s (backtrack: 0/20).

[ebuild  N     ] acct-group/automatic-0-r2::gentoo  0 KiB
[ebuild  N     ] acct-user/automatic-0-r2::gentoo  0 KiB
[ebuild  N     ] dev-libs/libpcre-8.45-r4:3::gentoo  USE="bzip2 cxx jit pcre16 readline (unicode) zlib -libedit -pcre32 -static-libs -valgrind" 1542 KiB
[ebuild  N     ] net-p2p/automatic-0.9.0-r1::gentoo  102 KiB

Total: 4 packages (4 new), Size of downloads: 1644 KiB