Perhaps even possible with just two tracks?

I´m thinking each track with their own one shot trigger, into delay with an double LFO setup (first LFO with ONE setting controlling the delay time, second LFO with ONE setting increasing the LFO speed)… sloooooooooowly increasing the time parameter?

Fire off the samples, then turn each delay lock ON? And let the LFO´s take care of the rest?

Just from top of my head though. Maybe I´m forgetting something here…