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

Calculating dependencies ... done!
Dependency resolution took 1.01 s (backtrack: 0/20).

[ebuild  N     ] x11-libs/libXinerama-1.1.6::gentoo  USE="-doc" 263 KiB
[ebuild  N     ] dev-libs/bemenu-0.6.23::gentoo  USE="X ncurses -doc -wayland" 138 KiB

Total: 2 packages (2 new), Size of downloads: 400 KiB