I will see you:
Mabel, Dipper, and Soos as separate characters
Bill Cipher and Robbie V as villains
Journal 3, Grappling Hook, and Waddles as Power Discs weapons. Mounts could be Mystery carts, Manotaurs, or Stanley Mobile/Soos's pickup
and limited edition three pack being Wendy, Lamby Lamby Dipper, and Mystery Shack clear piece (or Dusk2Dawn would be awesome too!)
I just see Stan as the perfect NPC (kinda how Cranky Kong was in the original DKC trilogy; have all the kids do the running for him, etc...)
I have both a Wii U and PS3 version of Infinity sealed. They will not be opened until GF swag is released for this!