@Oestov I feel like Isayama is willing to kill Levi off even if he never gets to fulfill his promise to Erwin. especially since he's nearing the end of the series and if he were gonna do it, he'd do it at the end cause a lot of people would probably drop the series if Levi is gone.
Also assuming this is the final arc there's not really any time for Levi to heal his wounds and make his grand entrance to the battle.
But i have 2 main theories
1: Correct me if i'm wrong but during marley didn't they steal more titan serum? But this theory goes off that being the case
So Levi's wound (at least with how he looked) seem too fatal for him to make a natural recovery, missing fingers, head wound etc.
The only people who could possibly make a full recovery from that much damage is a titan shifter.
So i suspect sometime after escaping with Levi, Hange will find an abandoned cabin, outpost or something and take Levi there
to try and treat his wounds but the damage he sustained was too much and she can't heal him.
Then it's revealed she has a titan serum on her (Because if anyone would be able to sneak a titan serum away it'd be Hange)
and she decides she'll turn Levi into a titan to save him, and later down the line she'll come back with a shifter like Zeke or Reiner
and feed them to him and save him. But she injects Levi and it doesn't work and Levi has some final words and dies in her arms...
OR Hange just doesn't inject him and decides that Levi should "finally be allowed to rest" and have Levi's death be similar to Erwin's
I personally prefer the first one but i think this would be a very good end for Levi.
2: This is assuming Floch (fuck floch btw) and the other Yaegerists hit there shots and hit Hange. Also no serum and Levi's wound
aren't fatal
And we go back to them in a hut, cabin etc. and we're seeing from Levi's perspective and he finally gains consciousness
only to find a bleeding out Hange laying next to him and she dies in his arms after some final words.
Levi's hatred for Zeke would grow even larger and he would recover as much as he could and then head off to kill Zeke
and possibly die fighting him.
But yeah all the other theories i have are essentially just different variations of those two theories
I hope neither come true and they are both fine but that's probably not the case
Show mercy Isayama please lol
Thank you for reading