I'll try and be fairly realistic (actually, scratch that thought) here...
Alexander McQueen: Frida Gustavsson by David Sims (set in a forest, pretty similar to last season but a bit softer so you have that juxtaposition between the frightening clothes and the nature of the forest).
Balenciaga: Anais P, Miranda, Nyasha and Zuzanna by David Sims (studio shoot, more 2006/7 era Balenciaga than the Meisel ads).
Blumarine: Anais M by Mario Testino (location)
Bottega Veneta: Chanel Iman (will probably end up being Cora Emmanuel, which is good too) by Philip-Lorca diCorcia (set in an abandoned, industrial location featuring very stoic poses. Still has that diCorcia sense of realism though).
Burberry: Jourdan by Alasdair McLellan (it could have an adventurous, hiking theme. IDK, the collection was hideous).
Celine: Carla Gebhart by Jurgen Teller (set in a jungle, not some house with plants)
Chanel: Anais P, Candice and Emily by Karl (I guess it will have to be) (set on a beachy-location, a bit like S/S 03)
Dior: Karolina Kurkova by Steven Meisel (set in a cafe, like one of those US Vogue eds...anything to make the collection slightly less boring I guess)
Dolce & Gabbana: Anais M, Anais P, Coco, Liu and Melodie by Steven Meisel (high-class call girls lounging in a Las Vegas penthouse at night
)
Donna Karan: Aymeline Valade by Patrick Demarchlier (set in a studio, but lots of mahogony, dark wood props to bring out the tribal vibe of the collection)
Fendi: Candice by Karl (IDK)
Givenchy: Gisele by I&V (I've been conditioned to think that Givenchy ads can only take place in front of a studio backdrop, so...)
Gucci: I hated the runway cast so I'll go with
MyNameIs' flawless cast by Craig McDean IMO (but realistically a Joan and Raquel repeat wouldn't make me mad)
Jil Sander: Kasia Wrobel and Shena Moulton by Alasdair McLellan (two poised women sitting on their porch in the English countryside, 1950s style like the collection)
Kanye West B): Chanel Iman by David Sims (studio shoot, the simpler the better. Jumping might help the clothes look less flattering, IDK.
Lanvin: Magdalena and Miranda by Steven Meisel (set at night, maybe at an abandoned train station, very similar to F/W 08 anyway.
Loewe: Marihenny by M&M (villa location)
Louis Vuitton: Antonia, Caitlin, Daga, Jasmine, Marihenny and Xiao Wen by Steven Meisel (a continuation of last season, set in a playground I guess with the girls on swings etc.)
Marc Jacobs: Crystal, Ruby-Jean and Sofia by Jurgen Teller (set in a theatre, the girls are sitting on chairs. Basically the show finale but in more of a Teller style)
Max Mara: Nyasha by Mario Sorrenti (studio)
Miu Miu: Kasia Struss by Bruce Weber (set in a forest, the ads will probably feel wintry but that would work wonders with this collection anyway).
Nina Ricci: Kendra Spears by I&V (kind of boudoir inspiration, very sexy.)
Oscar De La Renta: Emily by Craig McDean (studio)
Prada: Elise and Missy by Steven Meisel (studio)
Proenza Schouler: Liya by Robbie Fimmano (simple studio shoot with slight sepia toned background)
Ralph Lauren: Anais M, Karlie and Sui He by Bruce Weber (typical Weber and models take a trip to the beach, but with this collection it would look beautiful).
Stella McCartney: Candice and Miranda by M&M (very similar concept to this last season as it worked wonders IMO)
Tommy Hilfiger: Colinne, Cora and Fei Fei by Craig McDean (set in LA, ideally on a beach, similar to S/S 2010)
Valentino: Jourdan & Liu by David Sims (similar to this last season, because the collections were virtually the same)
Versace: Nyasha by M&M (either clean, clean studio shot or set overlooking a rocky beach like S/S 2009)
Yves Saint Laurent: Karen Elson by Jurgen Teller (I think this could work)
A lot of them sound similar, but they all look different in my head TBH. Bear in mind that LV never repeats the campaign girls from previous season (and I am 99.9% sure that Kate will not do it based off of Meisel and the fact that the collection is way too young for her IMO).