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 know a little bit about Doom mapping / ZDoom ACS scripting. It's been a long ass time, but I made a few decent Zdaemon deathmatch maps back in the day. I dug though the source code of Chocolate Doom and Odamex a bit too. My parents bought a joystick when I was five and it came with the shareware version of Doom on a floppy. The rest is history.