WI a Franco-German war in 1535?

I've recently been considering writing a timeline, but I would appreciate some advice from the more learned members of the board.
When Charles V attacked Tunis in 1535, the Pope asked that no wars were fought between Christian powers during the raid. However, at the time, Francis I was close to Suleiman and the Ottoman empire, and allied with them against Charles the next year.
What if Francis had ignored the Pope's request? Coming at this time, a Franco-German war would have inevitably involved the Ottomans, and possibly given the Schmalkakdic League a new lease of life. Could this have lead to an earlier decentralization or collapse of the HRE, or even a protestant France? And would such a war draw in other major European powers, and if so, on whose side would they be likely to join?
 
Well given that the HRE at the time was also King of Spain, it would rapidly degenerate into another Spain v France war, in which England would likely be again invited to send a token force to march out of Calais' walls, sit around in tents for a few weeks near Dunkirk, and then retreat again. It's possible that the Schmalkaldic League would get involved but I think it would be unlikely as in 1535 the League was relatively young and I'm not sure it harboured ideals of actually attacking the Emperor at that point - it was more a defensive alliance aimed at guarding the members' backs incase the HRE turned hostile first. With no provocation against them, they could even commit troops in defense of the Empire and possibly even earn the thanks of Charles - let's not forget that the Elector of Saxony held the title of Marshal of the Empire by right of position and thus was technically obliged to lead the Holy Roman Empire's armies into war.
 
Probably this would result in yet another Italian War, like the Italian War of 1536-38. Maybe France would do a little better with Charles V distracted, but if Charles cancelled the costly expedition and immediately returned to Northern Italy he might make good use of his 30,000 men against the French.

An earlier Franco-Ottoman alliance could lead to the Holy League of 1538 becoming an anti-French alliance, which could weaken the French position in Northern Italy. This logically follow a papal denouncement of France, but in 1535 Protestantism was too small of a movement for the King of France to embrace, especially when many of his most powerful nobles might opportunistically oppose him. If Francis I did embrace Protestantism, you might have the French Wars of Religion reversed, with the dissident lords embracing Catholicism to justify their revolt against the King.
 
Top