For a better overview:

The current situation is:

Released
Fedora-Server-39-1.5-x86_64-CHECKSUM
Fedora-Server-dvd-x86_64-39-1.5.iso
Fedora-Server-netinst-x86_64-39-1.5.iso
Fedora-Server-39-1.5-x86_64-CHECKSUM
Fedora-Server-KVM-39-1.5.x86_64.qcow2

Fedora-Server-39-1.5-aarch64-CHECKSUM
Fedora-Server-dvd-aarch64-39-1.5.iso
Fedora-Server-netinst-aarch64-39-1.5.iso
Fedora-Server-39-1.5-aarch64-CHECKSUM
Fedora-Server-39-1.5.aarch64.raw.xz
Fedora-Server-KVM-39-1.5.aarch64.qcow2

Branched
Fedora-Server-dvd-x86_64-40-20240408.n.0.iso
Fedora-Server-netinst-x86_64-40-20240408.n.0.iso
Fedora-Server-iso-40-x86_64-20240408.n.0-CHECKSUM
Fedora-Server-KVM-40-20240408.n.0.x86_64.qcow2
Fedora-Server-images-40-x86_64-20240408.n.0-CHECKSUM

Fedora-Server-dvd-aarch64-40-20240408.n.0.iso
Fedora-Server-iso-40-aarch64-20240408.n.0-CHECKSUM
Fedora-Server-netinst-aarch64-40-20240408.n.0.iso
Fedora-Server-40-20240408.n.0.aarch64.raw.xz
Fedora-Server-KVM-40-20240408.n.0.aarch64.qcow2
Fedora-Server-images-40-aarch64-20240408.n.0-CHECKSUM

Fedora-Server-dvd-ppc64le-40-20240408.n.0.iso
Fedora-Server-iso-40-ppc64le-20240408.n.0-CHECKSUM
Fedora-Server-netinst-ppc64le-40-20240408.n.0.iso.manifest
Fedora-Server-KVM-40-20240408.n.0.ppc64le.qcow2
Fedora-Server-images-40-ppc64le-20240408.n.0-CHECKSUM

Fedora-Server-dvd-s390x-40-20240408.n.0.iso
Fedora-Server-iso-40-s390x-20240408.n.0-CHECKSUM
Fedora-Server-netinst-s390x-40-20240408.n.0.iso
Fedora-Server-KVM-40-20240408.n.0.s390x.qcow2
Fedora-Server-images-40-s390x-20240408.n.0-CHECKSUM

Beta
Fedora-Server-dvd-x86_64-40_Beta-1.10.iso
Fedora-Server-iso-40_Beta-1.10-x86_64-CHECKSUM
Fedora-Server-netinst-x86_64-40_Beta-1.10.iso
Fedora-Server-KVM-40_Beta-1.10.x86_64.qcow2
Fedora-Server-images-40_Beta-1.10-x86_64-CHECKSUM

Fedora-Server-dvd-aarch64-40_Beta-1.10.iso
Fedora-Server-iso-40_Beta-1.10-aarch64-CHECKSUM
Fedora-Server-netinst-aarch64-40_Beta-1.10.iso
Fedora-Server-40_Beta-1.10.aarch64.raw.xz
Fedora-Server-KVM-40_Beta-1.10.aarch64.qcow2
Fedora-Server-images-40_Beta-1.10-aarch64-CHECKSUM

Rawhide
Fedora-Server-dvd-x86_64-Rawhide-20240403.n.0.iso
Fedora-Server-netinst-x86_64-Rawhide-20240403.n.0.iso
Fedora-Server-iso-Rawhide-x86_64-20240403.n.0-CHECKSUM
Fedora-Server-KVM-Rawhide-20240403.n.0.x86_64.qcow2
Fedora-Server-images-Rawhide-x86_64-20240403.n.0-CHECKSUM

Fedora-Server-dvd-aarch64-Rawhide-20240403.n.0.iso
Fedora-Server-iso-Rawhide-aarch64-20240403.n.0-CHECKSUM
Fedora-Server-netinst-aarch64-Rawhide-20240403.n.0.iso
Fedora-Server-KVM-Rawhide-20240403.n.0.aarch64.qcow2
Fedora-Server-Rawhide-20240403.n.0.aarch64.raw.xz
Fedora-Server-images-Rawhide-aarch64-20240403.n.0-CHECKSUM

In future we should aim at:

Naming convention
Fedora-Server----.

Released
Fedora-Server-39-img-x86_64-1.5.CHECKSUM
Fedora-Server-39-iso-x86_64-1.5.CHECKSUM
Fedora-Server-39-offline-x86_64-1.5.iso
Fedora-Server-39-online-x86_64-1.5.iso
Fedora-Server-39-virt-x86_64-1.5.qcow2

Fedora-Server-39-img-aarch64-1.5.CHECKSUM
Fedora-Server-39-iso-aarch64-1.5.CHECKSUM
Fedora-Server-39-offline-aarch64-1.5.iso
Fedora-Server-39-online-aarch64-1.5.iso
Fedora-Server-39-rawsbc-aarch64-1.5.raw.xz
Fedora-Server-39-virt-aarch64-1.5.qcow2

Or in alphabetical order / directory listing:

Released:
Fedora-Server-41-img-aarch64-1.5.CHECKSUM
Fedora-Server-41-img-x86_64-1.5.CHECKSUM
Fedora-Server-41-iso-aarch64-1.5.CHECKSUM
Fedora-Server-41-iso-x86_64-1.5.CHECKSUM
Fedora-Server-41-offline-aarch64-1.5.iso
Fedora-Server-41-offline-x86_64-1.5.iso
Fedora-Server-41-online-aarch64-1.5.iso
Fedora-Server-41-online-x86_64-1.5.iso
Fedora-Server-41-rawsbc-aarch64-1.5.raw.xz
Fedora-Server-41-virt-aarch64-1.5.qcow2
Fedora-Server-41-virt-x86_64-1.5.qcow2

And e.g. branched would just replace the version part:

Fedora-Server-41-img-aarch64-20240408.n.0.CHECKSUM
Fedora-Server-41-img-x86_64-20240408.n.0.CHECKSUM
Fedora-Server-41-iso-aarch64-20240408.n.0.CHECKSUM
Fedora-Server-41-iso-x86_64-20240408.n.0.CHECKSUM
Fedora-Server-41-offline-aarch64-20240408.n.0.iso
Fedora-Server-41-offline-x86_64-20240408.n.0.iso
Fedora-Server-41-online-aarch64-20240408.n.0.iso
Fedora-Server-41-online-x86_64-20240408.n.0.iso
Fedora-Server-41-rawsbc-aarch64-20240408.n.0.raw.xz
Fedora-Server-41-virt-aarch64-20240408.n.0.qcow2
Fedora-Server-41-virt-x86_64-20240408.n.0.qcow2

The same with beta and rawhide respectively.

Fedora-Server-41-offline-aarch64-Beta-1.10.iso

Fedora-Server-41-offline-aarch64-Rawhide-20240403.n.0.iso

Online / Offline sound as the best to me (but it's missing in the proposal section in the original post).

Hello folks, have we reached an agreement as to what the new naming convention should look like, Yes? Can someone with more information add that as a comment in the releng ticket, so we can take that as a single source of truth when we start working on it?

trying to get filenames perfectly consistent (in terms of where the arch, version and 'payload' strings appear, and how exactly the string is constructed) is a bit of a fool's errand - I did it years ago, but more or less gave up (see https://fedoraproject.org/wiki/User:Adamwill/Draft_fedora_image_naming_policy ). it's less important than it used to be since we have compose metadata, e.g. https://dl.fedoraproject.org/pub/alt/stage/41_Beta-1.2/metadata/images.json . If you want to find a given Fedora image in a random compose, get the image metadata and look for a subvariant + type + format + arch match; for Fedora images, the combination of those properties per image should be unique and remain consistent between composes. The metadata gives you the path to the image with those properties within the compose.

The exact contents of the filename depends a lot on the tool being used to build it, and can be hard to get perfectly consistent between different tools, but it's somewhat easier to get the metadata straight.

Changing the name of the 'dvd' image should be fine as the Server DVD is the only one we ship any more, but changing 'netinst' to 'offline' is a more significant change as we also have an Everything netinst, and I'm not sure whether we can change Server without changing that (and it might be confusing to do so even if we could).