I found a great overnight recipe off of Pinterest and I am putting a link for you:
Overnight French Toast recipe - from Tablespoon!
We had a friend come to visit us back in the summer and I made this the night before and put it in the refrigerator. Next morning while the coffee was perking and I made some bacon and got the juice out, this was in the oven. Use real syrup if you have some - you won't be disappointed!!! My small grocer didn't have any brioche but I used French bread and it was fine.