I think ultra-realistically what I would do:
~Some Greek columns and statues with plenty of flowers at the station exit/first turn.
~First launch, it would be really cool to have some trees create a “tunnel” effect to go through.
~First Helix should have a weeping Willow, some flowers on the inside, Italian Cypress’s on the outside.
~Launch set two is where I’d have some fun:
- A set of statues surrounded by columns
- Each statue is a different god
- lots of flowers, Italian cypress’s you make the launch area feel “set off”
- Forward launch 1 - Mercury god lights up with the sounds of hooves hitting the ground.
- Backwards launch - Pluto lights up with the sounds of screams.
- Forward launch 2 - Jupiter lights up with the sound of thunder
- Bottom of the drop - have a water feature that has a waterfall into the Rhine under the coaster, and Jets that shoot water over the coaster to almost give the effect of being underwater.
- A huge tree at the outward banked Turn to make it look like you are dodging it.
- The stall inversion would be over an area that looks like ruins. With red heat like effect.
- Final turn is through another “tunnel” effect from trees.
Then story wise the tunnel effect is you entering and exiting the garden of the gods. The Willow tree represents the wisdom of Minerva right by her launch. Wildflower all around so there’s minimal upkeep needed. At the triple launch your close to entering the underworld, so Mercury tries to help you escape (forward launch), but Pluto is too strong (backwards launch), till finally Jupiter frees you (second forward launch). Then you plummet to the realm of Neptune, before making a hasty retreat from the garden dodging the dangers one last time.