Hey Marcia!
Long time, no chat! I must admit that I was stumped by your reference to the Melody Garden Stage - I have honestly no idea where it is located! If it is located near Innoventions West, you are in luck. While you will be SERIOUSLY pushing the time limit, Le Cellier is located in Canada, which is the closest "country" to Future World. Also, Innoventions West is on the same side of the park as Canada. Yay!
Most sit down meals take about an hour and 15 minutes, but I would let your server know that you are in a bit of a rush. As soon as you finish your amazing, delicious, fabulous meal at Le Cellier, take a left and speed over to Future World. Even if you are going at a pretty fast pace, I would allow about 10 minutes. If you look at the
map, Innoventions is marked by the number "22" and Le Cellier is "6." It will be a close call, but a coveted meal at Le Celier is most assuredly worth risking it!
Much pixie dust
Jackie S.