One rumor for the coaster early on was Dracula, but that was when (supposedly) UC was considering a flying coaster for the theater replacement. I later heard they were going with a “kiddie coaster” to replace the theater.
Just after I heard they agreed on spinning coaster for it, which sounded more promising to me than “kiddie coaster” as the original rumor suggested, I also heard murmurs for it being themed to Wolfman and definitely not Dracula.
The timeline lined up, so seemed logical to me, BUT, while I heard “Mack spinning coaster” from two reliable sources, I only heard Wolfman theme from sources I’m not to familiar with. Then the internet seemed to go with it, including Screamscape, but all of that could have been echoing my original rumor reporting and not new info.