The question is what would the Danes be offered to make a restoration of the Hanoverians worth it? A domestic revolt in alliance with a joint Danish-Hanoverian invasion would have a great chance of success, in fact if the Royal Navy decides to let the Danish land a invasion force, Denmark could likely win on it own.
So here's my idea; the Stuart retake the British crown in 1745, the Hanoverians and much of the anti-Stuart British elite flee to Hanover. British foreign policy pretty much follow the same afterward as in OTL, simply because British interest haven't changed, so we still see the Seven Years' War happening, there Austria decides to support a Hanoverian reconquest of GB, they makes a deal together with Russia with Denmark-Norway to support the Hanoverian invasion against gaining Gottorp from Russia and Bremen-Verden from Hanover. In GB deals are made with opponents in the British navy of Stuarts to join the revolt. This result in domestic uprising, while a joint Danish-Hanoverian army land in England.
The result are that Seven Years’ War end in a Austrian victory and the Hanoverians return to power in GB.
That could be interesting. But by this point, Charlie is likely to have a son(s) of his own (probably born late '40s), while George II's heir is Friedrich Ludwig (who was considered English enough), and future George III (b.1738) has been raised in Germany between ages 7 and 18yo (so a far more "German" George than OTL). I wonder if they wouldn't just depose Charlie in favour of his son?