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

Calculating dependencies ... done!
Dependency resolution took 1.00 s (backtrack: 0/20).

[ebuild  N     ] x11-libs/libXinerama-1.1.6::gentoo  USE="-doc" 263 KiB
[ebuild  N     ] x11-misc/stalonetray-1.4.0::gentoo  USE="graceful-exit xinerama xpm xrandr -debug -kde" 99 KiB

Total: 2 packages (2 new), Size of downloads: 361 KiB