No they weren't.
No, I bet we'll see how they were obtained and their origin at some point.
So a guess whatever isnz mentioned and comes out is an asspull? Then yamato was an asspull, tobi was an asspull, juubi was an asspull.....
this thread is an asspull.....
Why?
The biggest asspull for me would be Minato's sage mode or Itachi's Izanami.
No, it wasn't.
Not everything can/will be foreshadowed in the story... some things need to have a surprise factor.
Do you know what would have been an aspull?
If Itachi had fought 2 major fights with a short period of time in-between and revealed those weapons only in the second one, when he clearly didn't have had them in the first fight.