That was the skunk works, but worth noting is that the first 3 designs (and many more impressive ones) were all designed by Kelly Johnson. The forth is not a lockheed aircraft (I assume you mean the B2), and flying wings were almost used in the second world war in the Ho229.
If you had told me that Kelly Johnson thought he could make fusion work then yeah, I would take it seriously, but he has been dead for 25 years. Since then I have not seen anything from them that was not a natural progression of what they had done before.