In Cubase Pro 9.0.1 when you create MIDI notes from hitpoints there are only three available destinations: First selected track, New MIDI track and Project Clipboard.
If Steinberg has added Sampler Track in Cubase 9, I don’t know why there is not a fourth destination: New Sampler Track. In addtion, I miss a fifth one too: New Instrument Track. These two new destinations would be usefull and VERY FAST for drum replacement into a Sampler Track or Groove Agent, for example.
I hope you add this option because in my opinion it’s pretty obvious. 
Cheers! 