I am super curious which 9 attractions will be featured in the DLC. Calling it "classic rides" could really mean a lot of potential candidates - after all "classic" is pretty vague, depending on who you ask
But as far as speculation goes, here are my guesses:
Coasters:
1. Wild Mouse (Steel, non-Spinning)
2. Bobsleds (Non-wooden, Standard cars)
Water Rides:
3. Boat Ride
Flat Rides:
4. Top Scan
5. The Whip
6. Tagada
7. Rotor/Gravitron (?)
8. Motion Simulator
Transport Rides:
9. ???
But to be honest, I already find it hard to figure out which rides could be considered classics. E.g. if you look at old RCT3 attractions, I am not sure if many of them already have to be excluded to Planco's specifics:
- water-based rides (swan boats, row boats): Group logic of guests
- Larger rides (topple tower, sky sling, sky swing): unpopular due to size requirements (height or footprint)
- RCT3 gentle rides (Mirror maze, 3D cinema): just having rabbit holes might be seen as cheap and be unpopular
Also, I find it very difficult to think of an attraction that may come in two variants! Is it the size again? Could it be theming-wise this time?