I think Charles V had the most chances, because with him surely the Hasburgs reached their historical apex; in the end he was forced to split his dominions but i try to build a possible TL.
- After Pavia, Charles V decided to invade France from all his states; with Francis I in his hands France crumbled and was put under Imperial occupation. Meanwhile instead to enable the edict of Worms the Emperor decided to open a negotiation with Luther who accepted.
- Soon was discovered the existence of a correspondence between Francis I and Suleiman the Great. the Imperial propaganda proclaimed it was a treason againist the catholic faith and the french king was hanged. Charles V caught the occasion and proclaimed the restoration of France into the HRE, declaring the end of the Oaths of Strassbourg of 842. The main French lords, accepting a partial refeudalization who give them more power, swore loyalty to Charles (who refused to claim the title of King of France). Henry VIII claimed the throne of France, starting to gain secretely support to French minor nobles and generally with every French who didn't accept the new rule.
- The Pope trembled after the annexation of France in the HRE and excommunicated Charles V who in 1527 invaded Papal states and occupy Rome.
- In 1530 Charles V opened the diet of Augusta, where he proclaimed the rebirth of the Western Roman Empire, and declaring Spain, Papal States and Southern Italy under direct imperial rule. Charles obtained a partial revision of the Golden Bull: the Hasburgs will be forever the ruler dynasty of the Empire. It was also proclaimed a commission to reform the Catholic Church leaded by Luther; in exchange the priest decided to renounce to any theological claim. Finally, Charles decided to declare Aachen new capital of the Empire.
- The situation soon deteriorated in England, where Henry VIII proclaimed in 1534 a church schism, imprisonated Catherine of Aragon and married Anne Boleyn. Charles V declared war on England; also Luther support this move.
- In 1535, with the help of a fleet builded from all parts of the Empire, the Imperials invade England. Henry VII was then defeated, imprisoned and hanged with Anne Boleyn, while Catherine was set free. England was declared part of the Empire, with Catherine as regent for the Emperor. It was decided that Catherine's daughter Mary and Charles's son Philip later will be unite in marriage. In a glimp of charity, Charles let Henry and Anne's daughter Elizabeth to grow in his court.
- Meanwhile Suleiman managed to conquered all of Hungary, and envious of the success of Charles he proclaimed the restoration of the Eastern Roman Empire (obliously an Islamic Roman Empire). Because Charles now was more focused to consolidate his enourmous domain, he recognize for now Suleiman's claim waiting for a better occasion.
- Last line: Philip, Mary and Elizabeth grown together, but the crown prince, proclaimed as Caesar from his father who assumed the title of Augustus, seemed more interested to the younger Tudor princess instead of his future wife... how will it ended?