Attack on Titan Manga Chapter 78: Big revelation and what the spoilers tell us about?

Even before 78^th chapter of Hajime Isayama's masterpiece Shingeki no Kyojin becomes available on major manga sites like Manga Panda and MangaFox, alleged pages of the said chapter has already been leaked into the Internet.

After hours of browsing the world wide web, I was able to find few scanned raw pages - which means the copies are yet to be translated in English - and a dialogue thread that explains what I assume the highlight scene of the chapter.

I, an Attack on Titan addict, will try to explain as much as I could to you my take on each exhibit. While I am not 100 percent sure of my hypotheses, please bear with me as I explore the ever mind-boggling universe of Shingeki no Kyojin.

Roll in the exhibit please.

Exhibit 1

Here we can see colossal titan making his first appearance in Shiganshina for the first time since that fateful day, when humanity tasted the wrath of the titans after 100 years of peace inside the wall.

We knew Betolt will be coming to help his buddy. The question now was he too late? Apparently not, I suspect Reiner is still alive simply because, even his head was blown off by the Survey Corps' thunder spear, the nape of his neck appears pretty much intact. And yes, Reiner was still able to make a distress roar after all the damage he absorbed.

In fact, I think the corpse-like head depicted on top was Reiner's in the process of regenerating.

Exhibit 2 & 3

Mikasa rages and tries to attack Bert but he kicks her instead, Armin says "No, stop!" and leaps over to catch Mikasa before she hits the ground below them and protects her from Bert who attempts to attack again

Armin says "You, you just..." and Bert says "You just don't understand! Nobody understands me! Ever! I thought you would understand since you've been through this, too!"

Mikasa is glaring daggers at Bert and has her arms protectively wrapped around Armin, tells Bert to (more or less) eat shit and die, but Armin says Bert's situation is complex

Mikasa doesn't care and tries to attack him, but Armin gets in front of her, putting his arms out. "No, Mikasa, it's...it's different."

"What are you saying, Armin!?" Mikasa yells, Bert says "Make your choice, now!"

Mikasa looks at Armin with worry and anger "What choice? What are you...talking about?" She grabs him by his shirt, looking betrayed

"He...told me something that, that I..." Armin starts to cry.

Mikasa was at it again. While the oriental beauty is one of the best soldiers the military has ever produced, her ruthless aggression towards the enemy is sometimes her greatest weakness. 

Chapter 78 just proved that. Mikasa, eager for retribution, rushed in for the kill towards Bertolt, but the warrior countered her sneak attack well, sending her tumbling down the roof.

Here, Armin looks confused and torn as he listens from his former comrade. What could it be? Perhaps, it's about Artlert's true identity or something about the history of the world and true nature of the titans. On the other hand, Bertolt might be just playing minds again.

As I mentioned earlier, these are plainly guesses on what will play out in Chapter 78. The leaks look legit, but it would be better to enjoy reading the chapter instead of making theory out of nothing.