I was just wondering if this were at all possible? I know Rakoczi's uncle married a daughter of Frederick V of the Palatinate (but the marriage was childless), and Rakoczi himself married a princess of Hesse-Wanfried. He had two sons - Joszef (born 1700) and Gyorgy (born 1701), as well as a daughter Sarolta (born in 1706).
Could they maybe bring new blood to Europe? Or would they be regarded as too parvenu?