Well... I wouldn't put it past Marvel to say, "Surprise! He has a bastard child who will now take everything over!" though that'd be REALLY shoddy writing.

Yes, that would be. Especially since if you're a head of a Fortune 500 company, you basically raise your child in the life. You wean them on stocks, figures, bottom line. You send them to the best schools, with the right people, you take them to meetings with you so that they can talk to Kings, and not lose the common touch with the heads.

There's a reason why heads of Fortune 500 companies build dynasties and do not have bastards. This is why.