Now that the Honda Civic will be coming in with a larger body, it makes sense that Honda would also upgrade the Honda Accord since it would be ridiculous to have both the Honda Accord and Civic come in with a similar body measurement.
New spy shots of the Honda Accord prototype also seems to confirm that the Honda Accord will be coming in with a wider body. Not only could it be coming with a bigger body but it will also be getting a new design as well.
Most people seems to think that it will be getting a new design that is based on the new Honda Civic. Which could also mean that the Accord will be getting the same engine as well although it is possible that the engine will be tuned to have a higher output? This is the Accord after all.