It would work, but I would suggest using lime juice instead.
No , they use new wine which is pure grape juice.
For drinking, or for fermenting and making wine.
You can use a combination of grape juice and brandy as a substitute for Marsala wine in a recipe.
You can use a combination of grape juice and brandy as a substitute for Marsala wine in Chicken Marsala.
You can use a combination of grape juice and brandy as a substitute for sweet Marsala wine in your recipe.
You can substitute chicken broth or grape juice for wine in a chicken marsala recipe.
It depends on what you are trying to accomplish. If you don't want wine because of the alcohol, you could use stock (chicken, vegetable or beef) If you need the sugar that is in the wine, you could use apple juice.
You can substitute Marsala wine in a recipe with a mixture of grape juice and brandy or a combination of sherry and sweet vermouth.
There's no reason not to use red wine in cooking (most of the alcohol evaporates) but you could try using grape juice.
How to make mulled wine: I've found a few recipes on the internet and added them under related links below (two of them are in german, I hope it's not a problem. If so, just ask me for a translation). For alcohol-free versions you can use fruitjuices instead of wine (orange juice, cherry juice, grape juice, apple juice,...). This is mostly used to make "Kinderpunsch" (children's punch).
The process of fermentation turns the grapes into wine.
You can substitute Marsala wine in a chicken Marsala recipe with a mixture of grape juice and brandy or a combination of dry white wine and a small amount of brown sugar.