https://www.pcgamer.com/fearing-cease-and-desist-from-bethesda-fallout-new-california-mega-mod-ramps-up/

Fallout: New California is a Fallout: New Vegas mega-mod that introduces a totally new storyline complete with 12 possible endings and some 16,000 lines of voiced dialogue. It's been in development for over five years, and last month the mod team behind it announced it'll officially release later this year on October 23. However, as the mod team explained in a recent Facebook post, New California's production is shifting into overdrive now that Fantasy Flight Games has announced an expansion to Fallout: The Board Game, also called New California, the existence of which could threaten the mod's release. 

"They have every legal right to [send a cease and desist order] without hesitation," the Facebook post reads. "It would be effortless on their part to wipe us out with a single email, erasing 7 years of work. We have a Wikipedia page, we have the first 19 pages on Google search results, the top results are about us, there are news interviews and lets plays and single videos WITH MORE VIEWS THAN THEIR ENTIRE COMPANY YOUTUBE CHANNEL -- and they still named their board game Fallout: New California. So they either never googled the words New California or they knew and just didn't care, because they have the bought and paid for license and we don't."