Bradman hit two triple centuries and so did Lara.
Obviously not all batsmen are made for hitting huge, spectacular innings. Tendulkar is the best batsmen overall but he isn't as good as Lara at hitting that kind of innings. For this reason I don't think he is the one to do it.
Another player who has a test average over 50 who is very unlikely to do it (against meaningful opposition) is Jacques Kallis. He's a very good player, but he isn't a great batsman like Ponting or Lara or Tendulkar or Dravid. He's an average builder - he has an average in their territory, but he has never made a double century, and his average now is the highest it's ever been over his entire career.
So what I'm saying is, Tendulkar won't do it not because he doesn't have the talent, but rather because such a feat doesn't suit his natural batting style. On the other hand, Kallis won't do it, simply because he just doesn't have enough talent.