It's hard to know in't it. Not sure how all that sort of thing works, to be honest.
There is a Music Business part of the SOS forum, which might be a worth a visit to ask what the options are for clearing samples from previous musical hits.
http://www.soundonsound.com/forum/po...=&Board=MUSBIZ
There are some great clued-up folks on there, 'Rob C' being one of them.
As a mere guess, I'd guess you'd get in contact with their record label and talk out the possibilities. Or get your record label to talk to theirs. A contract will need to be drawn up, so music lawyers will be involved.
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PS > And another thing! Will the Ti|3 have user customisable/importable wavetables?

A ribbon-controller or XY-Pad might be nice, too, please! Thanks!