It's really a question of time. We're made of all the same stuff as the rest of the universe, and eventually we'll return to that system. The big metal box may add anywhere from 1-10 years before you reach the same state you would if we'd just thrown your corpse in a ditch, but you'll get there.

And the thing about death is, it's forever. You have all the time in the world.

Personally, I'd rather not be in the box at all (drop me in the ocean, or grow some shrooms on me), but in the face of infinity, it's not like it really matters.