Though Mike Myers’ star isn't what it once was, you probably still remember back to when the Austin Powers movies were a cultural sensation. For a long time, conversations everywhere were full of catchphrases, in-jokes, and bad impressions inspired by the spy spoof films. Until everyone kind of got over them. It'd be fair to say that the series was a bit of a fad and only held its popularity for a limited time, but if an Austin Powers 4 ever did materialize, there's no doubt it'd bring in a pretty sizable audience based on nostalgia appeal alone.