Those CGs are from 2014 and have no bearing on what the actual thing will look like.
I don't think the final thing will be very close to the CGs at all, but to say they have "no bearing" is probably a little bit ambitious. Chances are the real thing will have a few superficial similarities to the CGIs (stealthy, maybe twin engined, with fuselage shaped for high supersonic or hypersonic flight)
The important thing right now is we don't know what any part of this drone looks like, apart from possibly a part of its tail and engine arrangement, so it could turn out to look like anything... including possibly incidentally sharing some features with the CGI.