Until now, the sophisticated and luxurious 7 Series sedan was sitting comfortably at the top of BMW's luxury offerings, but things might go a notch-up. As seen in the spy shots of a prototype, BMW seems to be 'secretly' planning a comeback of the 8 Series coupe, which used to be a part of the BMW brigade two decades back. Going for a modern day design, the 8 Series coupe can be a perfect answer to the Mercedes Benz S-Class coupe.