I would also look to revive the original scents of the detergents, softeners, etc. from the 50's - 70's. Today's fragrances are just too much and I still don't understand why we need 15 versions of Tide, Gain, etc... I understand the unscented stuff for those with allergies, but I am a little tired of smelling other people's laundry from 20 paces away.
Also, the same goes for bath soaps like original Safeguard, Zest (before it reverted to being just another soap), Lifebuoy and Lux and let's not forget Sweetheart Lime Deodorant Soap. All great products that were "discontinued".