On spiky circle: Center color with 25 pages!
Left: Meliodas vs. Galan!! Battle to the death, second round!!!
Right: Meliodas just acquired a huge power-up at the druids' viillage!! He will confront Galan once again to test out his power!!!

https://twitter.com/Animeland_mag/status/626218369033838593
https://twitter.com/Animeland_mag/status/626218703001120768

There's a new LN by the author of one of the existing LNs. The title is "Karera ga Nokoshita Nanatsu no Kizuato" (The Seven Scars Left by Them).

As far as mythology goes, Lugh's (Meliodas') grandfather is the final villain. That could imply that the Demon King himself is the 'center' of darkness.
Balor (the grandfather) has a 'vision', in which he sees his downfall. The one to take him down is 'Lugh', one of his grandchildren (who are not born yet). As an attempt to stop this, he locks his daughter in a tower, but she gets impregnated by some guy and gives birth to three children. Two of them are drowned by Balor, whereas the third, Lugh, defeats him later on.
That could mean that the Demon King kills Zeldris and Estarossa, because they choose to oppose him.

For those of you who don't know, Balor was a god with a daughter that had three sons. There was a prophecy that one of his sons would rise up and kill him, so he trapped his daughter in a tower of crystal so his sons could never threaten him. The daughter was rescued by a Druid of the forest, but the only son he managed to save was Lugh, the two other brothers were sealed away by Balor. When Lugh defeated Balor, his eye crashed into the Earth, leaving a massive crater in the earth.

Now what are the similarities to Taizai?

This chapter (113) pretty much confirms Estarossa and Zeldoris are Meliodas's brothers.
Hendricksen says that he was a Druid of the Forest, he could possibly be descended from the Druid that rescued Balor's daughter.
We know Balor exists in this universe because Merlin had Balor's power eye.
The story of the crater being created when Balor crashed into the Earth directly mirrors Meliodas and Danafor.
When Ban and Hawk were talking to the Horn of Cenuros, they say "He now goes by the name Dragon's sin of wrath: Meliodas" heavily implying that he went by a different name before. Why?
When you look at Lugh in mythology, he is described as a man who is forever a boy. In all the illustrations, he is depicted as a being a young blonde boy eternally. Now does that sound familiar to anyone we know?