I don’t think the point is Dr. Evil is “now in charge of GM”, it’s that his empire has reinvented itself in his absence. That’s kind of been the case in each of the movies, or at least coming up with a new venture to destroy the world. I suppose gas vehicles are the metaphor for “evil”.
I think this is a great marketing campaign. GM has really stepped it up recently. The “real people” campaign was atrocious. The only good thing that came out of that campaign were the series of YouTube videos mocking them.