Building a monorail on the side of a mountain is not as easy as it is on flat land, for obvious reasons. And besides the road needing to be accessible for the fire department, you forget that there is the Starway in the way of your original blue-line route. Not to mention "IF" DA was replacing Mummy, your route would not work. While the red-line route is more plausible, it still WON'T happen! Too many variables stand in the way, which is why the rumor of HE just being a simulator attraction exists.
And as crazy as it is to believe, the rumor of DA going on the Upper Lot where Waterworld is located, is actually a legit rumor being considered. It is obviously a "I'll believe it when I see it" rumor, but considering how this park is doing things lately.... we should not rule anything out (except for a HE to the Lower Lot, that we can rule out for now
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