Kind of overlapping with the stuff you can do with audio track slicing and Groove Agent SE.. But I get your point. Sample Track has a lot of potential since it's so integrated into Cubase 9.
The Groove Agent SE approach:
1. Load loop into audio track.
2. Detect and edit hitpoints and slice.
3. Open Groove Agent Se and drag and drop the sliced audio part to the first Pad. Slices are now mapped chromatically.
4. In Groove Agent Se switch over to the "Pattern" view and drag the created midi pattern to a midi track in Cubase.