MicoSelva
backlog digger
They would be really wise to use both "project" and "eternity" but at least one out of two isn't bad. If there is anyone with a marketing degree within 50 miles of Obsidian HQ they would surely scream this as if the rapture had come.
Personally I would create an overall fiction setting and name it, then make "Project Eternity" the subtitle for volume one. Random example: Fallen Worlds: Project Eternity.
Well, I'd ditch the 'project', but 'eternity' is nice for either the main title or the sub-title (assuming it will be something1: something2 in the end).