I think this detail could help us to find out with Oden was teleport into the future(if he is really Oden and not a fake version).
In the current chapter(pls take the attetion around Oden body):
This Oden has a goatee, this helping us enough to at least know with Oden was send into the future.
Since this was Oden in his first reveal:
No Goatee
Oden when he was travelling with Whitebeard and Roger:
No Goatee
Oden when he come back to Wano and attack Orochi:
No Goatee
Oden during the five dancing years:
He slowly made a goatee, in his last year he finally had the goatee with we alsoo see in the spoiler picture, also the Oden in the cell had a Goatee too:
The only Oden who had a Goatee was the Oden before his death, in his five year where he return to Wano and dancing, in his last year he had the Goatee. With means the Oden with we see(fake or not) can only be the Oden on his final year(or even days). With means prime Oden, who also know the situation of Wano. With means neither his younger version, the version where he travel with WB or Roger was send intoo the future, no one version of Oden had a Goatee during his younger years or when he travel with Roger.
Soo this is most like the Oden in his final days(the time where he only had the Goatee).
So we can assume if Oden is the real one and not a fake, it is most like the Oden before he get killed(with coming together with my point that Oden was travel into the future during his days where he was sitting in his cell?).
First the swords(no enma and Habakiri) and now the Goatee, I doubt Onimaru or Hiyori would pay attention for these important points. Probably Kanjuro would did it, so as I said before it can be either the Real Oden or Kanjuro use a trap with a fake Oden, but we already have the fake Oden stuff so I really believe this is the real Oden, before he get killed in the past.