War of the First Coalition if Leopold II was still alive

When France declare war on Austria in the War of the 1st Coalition, she declared war on Francis as "the King of Hungary" (one source https://archive.org/stream/historyenglandei05leck#page/601/mode/1up) ; Francis had yet to be elected Emperor at the time.

So say Leopold was still alive or even if Francis had been elected and France declared war on the Holy Roman Emperor, could the war of the 1st coalition have become a war of Imperial defence like say the Nine Year's War? or would the Imperial estates proclaim neutrality at the Diet. Thanks!!
 
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