Maybe someday when I'm better at making doom wads I'll host one and as project lead.
spoiler
btw I'm bagsying the map name "A Spectre Hangs Over Europa" in case we ever do make one
Edit: just to be clear this is just me seeing how many people are interested, I don't feel I have the experience to run a community project at the moment and am currently working on a solo megawad on the side anyway. However, if enough people are interested I'd like to make it some day
I have no classic doom mod experience. I've done The Sims (the first one), TF2, HL2, San Andreas (which is a huge pain because of the naming conventions and file structure). Now I just make stuff for Unreal because it's so easy and widely used. It's all kind of the same idea though.