I agree with Polley, the Moon Shot has the best concept presentation, but unless SDC is adding something akin to Disney's Tower of Terror (the Orlando version) I have zero interest in this attraction.
The Stagecoaster would be unique to the area, but Zamperla coasters are underwhelming and too short.
That leaves The Bull. Clearly the best option for thrill fans, but unless some additional narrative elements are added, the end result will be less SDC and more Six Flags/Cedar Fair. Still, if GCI or the Gravity Group is involved, the layout will be unique and terrain hugging, and the ride will be fast, thrilling, and smooth.
Of the three options listed, The Bull would get my vote.
(M. Havoc - recent SDC convert [2009], and long time lurker, but first time poster - be gentle!).