There's a great thread over at NeoGAF right now. It asks "What franchise would you like to be given to another company?"
Some posters have combined two favourites, for example, a Miyamoto designed Sonic game or Zelda as done by Kojima Productions. Some have picked a series that needs a shake up and handed it to the developer they see best-equipped to do so, such as Naughty Dog tackling a new Legacy of Kain or Sony's God of War team taking on Castlevania.
A few have opted for nonsense: just how badly would Sonic Team screw up Mario? And for every genius suggestion (Treasure doing the next Sonic? Yes please!) others have played it safe and boring: what's the point in getting Team Silent to make a Resident Evil game? Or Bizarre Creations to add some kudos to Gran Turismo?
Personally, I'd love to mix things up a little. Just imagine what Tim Schafer and Double Fine could do with the Silent Hill world. How might their brand of surreal humour and wildly inventive play mechanics mix with a traditional survival horror experience?
Who would feature in your dream match-up? And what sort of twist on the franchise would you like to see them deliver?