10 INTERESTING THINGS YOU NEED TO KNOW ABOUT ATTACK ON TITAN'S 4 YEAR TIMESKIP

This is four years into the future. Eren and the guys just havent been shown yet. Maybe on a later chapter. But we did get a hint on what they're doing right now. They're still on their island, Paradis island, and they're destroying any ships sent by the Marleyans to investigate the island. So this must mean they at least understand their current situation, which is war between them and Marley. In my opinion, I think Eren's group is trying to imrpove their fighting chances by training and research. I mean Hange is still with them so I think they're furtherting their research with regards to the titan powers.

Now, with regards to the Titan identities, this is what we know:
1. Eren has two, the Attack titan and the Founding Titan. The Founding Titan has not been revealed yet, but we know its power. The Founding titan power can command any titan within the vicinity. It is unclear if it can be done to titan shifters. Maybe. This ability to command titans must not be confused with the beast titans ability (which will be explained later).

2. Armin is hte Colossal titan. He got this power when he devoured berthhold.

3. Annie was the Female Titan. It is yet to be known if Eren's group succeedded in getting this power, as Annie is still preserved in stone. But four years has passed. Maybe they finally have it. We dont know. Hence Zeke's remark that the Paradis group may have possession of four titans: founding, female, colossal, and attack.

4. We know Reiner had four other friends when he was a kid: Marcel, Berthold, Annie, and Galliard (Pokko). Berthold was the colossal, and annie was the female. Marcel got eaten by Ymir, the dancing/jaw titan. And Galliard, Marcel's brother, ate Ymir when she got captured, thus turning Galliard into the dancing/jaw titan. In my opinion, i think its not called the jaw titan, but the DANCING/JUMPING TITAN, as the jaws are just, like, accessories to the titan. Its main ability is to jump and lunge at the enemy.

5. The kids Gabi, Falco, Colt and Udo are titan students, meaning they are being trained to become the next Titan shifters. Colt is to Zeke (Beast), Gabi and Falco is to Reiner (Armored), and Udo is yet to be known.

6. To summarize, the titans that we know of and their identities NOW are the ff:
Founding Titan - Eren
Attack Titan - Eren
Female Titan - Annie
Colossal Titan - Armin
Armored Titan - Reiner
Jaw/Jumping/Dancing Titan - Galliard
Cart Titan - Pikku
Beast Titan - Zeke

That's 8. We know there are 9. The two other choices could be the Purity Titan and the Area Titan. Idk about these two.

7. We know that titan shifters die 13 years after recieving ther powers. Zeke and Reiner both are running out of time. I think they both have two to one years more. Eren has four more years, since the manga had a time skip. This means two things: Shingeki no Kyojin is ending, and Eren is going to die.

8. The Ackerman's are super soldiers. They're like Captain America or some shit: people engineered to be warriors and fighters since birth. And apparently, this is genetic. We know this since Mikasa is, like, half-Ackerman ( mother is the gene source while father was a nobody). Unless, of course, the Ackerman gene is always a dominant gene, then maybe Mikasa is pure blooded. We dont even know if Levi is also a pure blood. We know one of his parents were ackerman. We know his uncle Kenny was an ackerman. We know Kenny's father/grand father was ackerman. So... yeah.

9. Regarding the Beast titan's commanding ability, Zeke injects his spinal fluid on people/soldiers and then forces their bodies to turn into titans that he is able to command.

10. Eren hasn't told them yet of the possibility of him needing to eat Christa Riess to gain the memories of the first Titan king.

Okay let's recap on what we know so far and summerize it:

Falco and Colt are brothers

Colt who is the older one may inherit Beast Titan
Both Gabi and Falco are potential candidate for Armored Titan (although it favors more for Gabi)
Reiner has two years left
Zeke has one year left
Pieck (Pikku) the girl with the crutch is the Cart Titan that crawls.
Galliard the Jaw Titan is the brother of Marcel (who got eaten by Ymir)
Reiner vision of his old comrades:
*Falco as Galliard
*Zophia as Annie
*Udo as Bertholdt
*Gabi as Marcel

22 years ago (Zeke is 29 now but he was 7 when his father Grisha was sent to Paradise Island along with Attack Titan stolen from Marley).
Zeke may have a son, who might inherit the Beast Titan over Colt due to Royal Bloodline of Ymir.