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

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

[ebuild  N     ] net-dialup/ppp-scripts-0::gentoo  2 KiB
[ebuild  N     ] net-dialup/ppp-2.5.4-r1:0/2.5.4::gentoo  USE="pam -activefilter -atm (-selinux) (-systemd)" 990 KiB
[ebuild  N     ] net-vpn/pptpd-1.4.0-r5::gentoo  USE="-gre-extreme-debug -tcpd" 247 KiB

Total: 3 packages (3 new), Size of downloads: 1238 KiB