Okay, so I have this idea for a major twist at the end of a book (to set up the next one) but it hinges on a conspiracy. Without giving too much away, here goes: At the end of the book, the book's secondary villain (secondary in the series, but the main one for the book in question) is about to be imprisoned. She breaks free, kills the guard and releases a fellow prisoner (the main villain of the series). The prisoner's escape was planned out by a politician who wants to use the prisoner, and the havoc he will invariably cause, to further his political career. So the bare bones of it is, the prisoner gets released and is allowed to cause havoc, in turn, he must help the politician with his goals. Does this sound like a plausible conspiracy or is it a little weak?