What's remarkable is how the outfits Michael Jackson wore in his video with Janet, Scream, would be 100% wearable as trendy pieces for Fall 2009, and it was made 1993. They had textured 3D knit tops (seen on the Central Saint Martin runway and Swedish designer Sanda Backlund's latest collection), skin tight black PVC pants (seen on many runways, Alexander Wang being a big one), long black fur jackets (Alexander McQueen for one), very fitted metallic silver pants (Elise Øverland), and Eastern inspired loungewear as casual wear (D&G Spring 2009).
As is evident to anyone who analyzes fashion trends in correlation to world events, fashion inevitably changes every time there is a shocking or sobering event.
I feel very strongly that some kind of Michael inspired trend will be coming about as soon as it can be designed and manufactured, since undoubtedly most designers could cite him as an influence growing up. Not to mention that some brands like Balmain already resurrected the military type of jackets he used to wear for their Fall 2009 RTW collection, and a whole slew of companies had jumped on the general 80s trends that Michael helped create originally. So more 80s trends will be reinvented and stay strong at least one more season, though will probably be here longer than that.
There have been some strange trends going on with legs in the past year or two, what with harem pants, pegged jeans, and a weak movement to bring back the bell bottom. I think most people will say that the skinny jean is still more interesting, and with Michael wearing skinny leg pants or cropped straight leg pants, I see legs going back to that once again. Some runways like Burberry for Spring 2009 RTW featured ankle socks with every pair of heels, even open toe, so maybe this will manifest itself in a white sock + cropped pant leg trend.
Like I've mentioned multiple times above, the military jacket was huge with Michael, and was already on runways in both seasons this year, so I definitely see that trend making its way to the mainstream. If not the overt military styling, the silhouette will be there, with flared out shoulders and slim sleeves, maybe cropped or designed to be pushed up, and with detail to the lapels.
In addition to being the King of Pop he was also the king of embellishment, his live comeback costumes were going to feature tens of thousands of Swarovski crystals so I definitely think with a small rhinestone/stud trend already going we will see this blow up.
If I had to pick some specific colors for Fall 2010 inspired by Michael I would go with a strong medium toned red, strong black, strong white, rich gold, metallic silver, and a strong navy.