The second-to-last Margrave of Baden-Baden, Ludwig Georg Simpert, had four children by his first wife, Maria Anna of Schwarzenberg, unfortunately only one - a daughter, Elisabeth Auguste (b. 1729) and thereby useless for the succession - survived infancy.
Now there had been plans to marry Elisabeth Auguste of Baden-Baden to Margrave Karl Wilhelm Eugen of Baden-Durlach (cousin to Erbprinz Friedrich of Baden-Durlach), who even went so far as to convert to Catholicism to marry her and her uncle, August Georg, contracted an agreement which acknowledged that Karl Wilhelm Eugen would inherit the Bohemian properties of Elisabeth Auguste's mother, as well as the style of Margrave of Baden-Baden.
Unfortunately, Elisabeth Auguste refused to consent to the contract, and the marriage fell through. Elisabeth later married the Count von Althann, a Czech nobleman 14-years her junior, in 1775.
Now, what would the effects be if Elisabeth Auguste and Karl Wilhelm Eugen had indeed married? Thoughts?