Here are some great spy photos that I found of the new F-150.
There's a couple of things that are interesting from these photos:
1) It doesn't look like it will be a complete redesign (which is a bit disappointing)
2) I love the new look of the headlights
3) The cab seems to be a big bigger than the current F-150
4) The rear suspension looks to use the same solid axle as the current F-150
5) There seems to be a new design for the dashboard