You are being intentionally obtuse. A mainstream mega hit is in no way among a particular group. Those franchises you mention may be in a way, but their touchstone movies are all mainstream hits. Videodrome or Twin Peaks are cult classics, not Fifth Element or X Files. Like, Twin Peaks was a big hit for a very short amount of time, then its popularity nosedived. The continuing fans them were the cult. But Airplane! was a mega hit and never went out if vogue. It spawned a sequel and a whole genre of slapstick parody.