The Scientists were likely both grunge's inventors and the genre's first supergroup (members had previously played in Cheap Nasties, Slick City Boys, and Victims). However, if one hears “grunge supergroup” they more likely think of Temple of the Dog, a one album wonder the members of which had previously played in Seattle grunge bands including Soundgarden, Green River, and Skin Yard (as well as the not-really-grunge one album wonders Mother Love Bone and not-at-all Seattle - since they were from San Diego - Bad Radio). Mad Season, when they're remembered, are that other grunge supergroup.
Mad Season arrived pretty late on the scene, toward the end of 1994. In April of that year, Kurt Cobain had killed himself but alternative and music had by then long ceased to be anything remotely underground and was resolutely mainstream. In 1992, MTV had replaced 120 Minutes host Dave Kendall with, Lewis Largent and the program, which had previously showcased a host of bands playing diverse music became a parade of bands whose members dressed like Largent, in shorts, combat boots, flannel, and backwards baseball cap. If that wasn't mainstream enough, MTV also launched the ironically named Alternative Nation as a showcase for the manufactured corporate guitar rock favored by soulful dudebros (eg Candlebox and Stone Temple Pilots).
In 1993 Marc Jacobs had served up grunge realness on the catwalk for Perry Ellis -- five years after Martin Margiela had pretty much done the same thing, serving up a fantasy of homeless fashion for the one percent. By 1994 pre-ripped jeans and combat boots were part of a uniform adopted by the knavescene and celebrities like Brad Pitt, Johnny Depp, and Keanu Reeves. Their female counterparts, such as emaciated supermodel Kate Moss, were used to promote heroin chic. After not having heard any interesting new American rock in what seemed like forever, I gave up on it. I would hear the names of new bands, including Toadies, Seven Mary Three, Sky Cries Mary, Jars of Clay, Primitive Radio Gods, Eels, DC Talk, Duncan Sheik, Sister Hazel, Local H, and more. All would have their champions but like every Steven Spielberg movie since Raiders of the Lost Ark, if I gave any a chance I'd almost certainly be underwhelmed.