While coaster enthusiasts would consider Mummy a 'family coaster', Universal has always pushed it as a thrill ride and it's viewed as much by a lot of if not most general guests. So you could make the argument, but it isn't at all the same from an image standpoint as what Hagrid is viewed as. And there are other areas such a thrill coaster could go. Universal has been very good at utilizing limited space for a while now.
Honestly, I'd almost like to see something close to Universal Japan's Hollywood Dream Coaster, but launched with some good inversions. Running the park boarder around Backlot/Celebrity Circle, maybe a nice element just over the Citywalk Lagoon. Now, that's just bluesky talk for me.