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

Calculating dependencies ... done!
Dependency resolution took 1.60 s (backtrack: 0/20).

[ebuild  N     ] x11-libs/libdockapp-0.7.3:0/3::gentoo  USE="X -static-libs" 379 KiB
[ebuild  NS    ] app-text/docbook-xml-dtd-4.3-r2:4.3::gentoo [4.1.2-r7:4.1.2::gentoo, 4.2-r3:4.2::gentoo, 4.4-r3:4.4::gentoo, 4.5-r2:4.5::gentoo] 82 KiB
[ebuild  N     ] x11-libs/gdk-pixbuf-2.44.8:2::gentoo  USE="gif jpeg tiff -gtk-doc -introspection -test" 5897 KiB
[ebuild  N     ] x11-libs/gdk-pixbuf-xlib-2.40.2::gentoo  USE="-gtk-doc" 53 KiB
[ebuild  N     ] x11-plugins/wmmenu-1.3-r2::gentoo  33 KiB

Total: 5 packages (4 new, 1 in new slot), Size of downloads: 6442 KiB