In order to buy out Paradox, EA would have to make an offer for their entire existing share float, which would then have to be accepted by the shareholders. This means that they would almost certainly sell their stock at over market value (because why would they accept less?).
From their point of view, this would be a good thing. So why then would the shareholders allow this project to be cancelled if it was about to net them a huge payout, according to your theory?