Thanks for the interesting ideas so far, I would like to try each of them.
The method with midi - suggested by JimFogle - makes me skeptical because of the quality of the sounds (midi drum compared with Realdrum !), but I guess that with a good drum kit the results are not bad.
On the other side, the enormous advantage of a complete control over each beat and instrument is unvaluable.
I think it's only a matter of finding a good sounding midi drum kit to overcome the first step that scares me a bit.
The second approach - from Jeff S - is very interesting because the various fills - the little bricks of the solo - would be generated from BiaB/RB, which is a guarantee of good sound quality, and would be performed by a real drummer. It takes some patient indeed, expecially by cutting, pasting, slicing ant so on, but the result could be a killer drum solo.
The third one - rharv - is also very appealing, the only difficult here is that I should self create the drum solo, or find a good midi solo groove to be used in the drum kit of the sampler.
The advantage here is that such drum 'kit' contains the same drum samples of the Realdrum, hence it should merge perfectly in the drum track.
Perhaps the process to prepare such a drum kit with the right sampler would take quite the whole time; more, in the midi solo groove, each single note should match the right instrument in the kit.
Three different approaches, a whole field of opportunities :-)
I've suggested more than once that PGMusic include a sample playback plugin for just such purpose.
Indeed would be really useful. Furthermore, would be nice to have each 'note' of the realdrum on a piano roll editing view, where each note triggers the relative percussion instrument and can be edited/moved/added like midi notes.
I know there are the RealMidi for that purpose, anyway would be nice to have a total control on the Realdrum performance of any Realtrack.