Voted real Oden....
My most likely scenario is he survived the execution by some method and he's just there by leaping into future with Toki!
A very great twist would be it's really Oden but he's not alive... and Scabbards are actually dead so now they can see him in afterlife... and Oda can actually write a very emotional dialog... for example a nice scenario would be like:
- They all jump on Oden hugging him...etc... then they see Toki... and they have an extatic dialog with each other... then Oden tells them to follow him... they take a shortcut to the rooftop, while Oda throws a small hint that some soldiers passed and they did not see them.... Some of scabbards get skeptical about it...
They reach the rooftop, see Kaido/Big Mom vs Supernova
Kinemon and co say they will get help Mugiwara... but then Oden stops them, he tells them "you've done enough, I'm proud of you"... then we hear someone who's sitting on the corner watching the fight say "oh, so you've come to join... huh"
This is actually Yasui!
Scabbards are confused... what's happening, Yasui sama is alive? But we need to help Mugiwara too... Oden tells them that they are souls now, dead wandering... and also says "I am really proud of you guys for bringing such a group, but let's leave it up to them"
Toki picks a shamisan, starts to play the music of war
We see a figure with Sihlouette but his hair looks like "Shimutsuki Ryuuma" who also is watching the battle on the sides...
Oden: "now, let's see how this war will unfold" while smiling while ending that act on the biggest of high notes!
-Red Scabbards dead
- confirming Toki and Oden to be dead
- Ryuuma sihlouette is there, his flashback is coming soon while watching Zoro's fight.
- End of act 3