I've been listening to the Return of the Jedi Radio Drama in my car the past few days, and something that I'd previously considered a throwaway line seems to contrast pretty interestingly with one of the most important lines from Attack of the Clones.
Luke: You can't die, Master Yoda.
Yoda: Strong am I in the Force, but not that strong.
Anakin: I will be the most powerful Jedi ever, and I'll even be able to stop people from dying.
We already know from TPM that Anakin is (potentially, at least) stronger in the Force than Yoda. That's not an issue. We also know that the line in ROTJ was probably intended as nothing more than just a cute one-liner twenty years ago.
But the line in AOTC is definitely not a throwaway. It's foreshadowing something, but what?
Is it just a reference to Vader's saving Luke (and "Anakin," who according to Obi-Wan, is dead) in ROTJ? Or maybe the three Jedi we know to return from the dead (Obi-Wan, Yoda, and Qui-Gon) were able to do so because of their own powers in the Force and the love (familial, of course) they felt for the Chosen One?
Or perhaps the lines aren't connected, and Anakin will fall to the Dark Side because he believes fails in his promise, allowing Padme to die (or appear to be dead to him, at least).
Or something altogether different, maybe?