In my opinion the puzzles should be way harder, I truely miss those old school hardcore puzzles in games where you actually have to think.
yeah, I think Tomb Raider (not the new one, it was great but it lacked in the puzzle department if you ask me) usually has awesome puzzles, especially those in - the tomb raider 1 remake - Anniversary
I think if any villan could return it should be Talbot or Dante. Most people put the pieces together that the villan from golden abysscwill feature in this installment, but if this is 15 -- or less years after the events in UC3, Talbot could have a chance to come back. I also think it possible for Narravo making a comback if it was possible to escape from his binding to El Dorado, but this is Uncharted so you never know.
Talbot will come back as a Djinn
Sort of Off-Topic:
Why is there still no Uncharted (PS4) board? This place does the job but I still feel that it should have it's own board.
They won't put it up until a real debut trailer appears, most likely right after VGX, IF they show it then.