The short answer is yes. But Cubase won't import .acd files (the ACID project file).
It is easiest to do if you do your drum mix the way you want it in ACID, render it as a stereo .wav - that can be imported into Cubase. The bummer in this situation is that you lose control of your individual drum tracks (if you had any to begin with)
but if you are careful in your mixing of the drums in the first place, and get them spit shined before you render, it is good to go. If you are getting
ACID Pro 3.0, it comes bundles with Sound Forge XP 5.0 - which is a junior version of Sound Forge 5.0 - but is still very good and useful - anyway, that is good for some extra .wav editing if you need it before (or after) you dump it into Cubase.
Technically, if you had, let's say, 8 drum tracks in ACID, you could render each individual drum track as a .wav, and then import into Cubase to maintain individual control.
So, yes, you can technically do what you want. Just remember that you can't import the .acd files - Cubase won't read those.
Another thing, you can do the reverse - write your MIDI in Cubase and then import the MIDI into ACID and have ACID control your sequences. Haven't tried this yet, but I am pretty sure it is possible.
Brad