Awesome!
Hopefully the engine is going to be better.
Gamebryo is aged and certainly has it's quirks, but I think I wouldn't mind too much if it happened. It's the universe I can't get enough of, fascinating to explore the wastes for hours upon hours uncovering little tidbits of lore.
But yeah, I'm hoping for one of the newer engines this time around.
Source 2, or UE4 would be nice ones but I would imagine there's some wacky licensing/IP issues. Just hoping and praying it's not IDTech 5.