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

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

[ebuild  N     ] acct-group/prowlarr-0-r1::gentoo  0 KiB
[ebuild  N     ] acct-user/prowlarr-0-r1::gentoo  0 KiB
[ebuild  N     ] www-apps/prowlarr-bin-2.5.1.5464::gentoo  97088 KiB

Total: 3 packages (3 new), Size of downloads: 97088 KiB