If they do return to that scene in s3 it definitely won't include everything. For example, after Erwin smiles creepily, in the manga Levi says it's creepy to which Erwin answers with a small smile that he was often told that as a kid. It's impossible to come back to this particular moment since they already showed the creepy smile only to follow it with a different dialogue. So this exchange will never happen... Hopefully they keep the 'hey, don't you feel sorry for me?' moment. It's too cute.
I rather fear you’re right Anon and I must admit I’m really disappointed that they cut the creepy smile conversation, it’s such a great Eruri moment and speaks volumes about Levi and Erwin’s relationship.
If Season 3 does return to this scene I’ve a sneaking feeling they might pick up with the conversation about Eren and Historia and then Levi announcing that he’s reforming his squad as this basically sets up the Uprising Arc.
Although if they do pick up this scene, they’ll have to change it around because Hanji has already left the room in the anime.
I’d be a very happy bunny indeed if they animated this scene but I rather fear it has gone the way of the creepy smile. We’ll see Anon, we’ll see.