4 felt almost beat for beat from the manga. Really close adaption an it should be more popular. But no simulcast rights seems to have hurt this series an I have to wonder why.
Oh some good news http://www.animenewsnetwork.com/news/2014-10-27/the-seven-deadly-sins-anime-casts-yurie-kobori-tomoyuki-shimura/.80374 says that amazon is saying that this is 24 episode series. Also ....
http://www.animenewsnetwork.com/news/2014-10-13/japan-animation-tv-ranking-september-29-october-5/.79854 It came in 8th! with a 4.9 share. Thats large for a new series.
@takashichea: On deeper thought their have been other shonen that start off with the main character OP. But um this one its um he is more powerful than you think. By miles. Bleach started fairly strong then went over the top. One Piece built up as it went. Seven deadly sins is not typical in that power ramp but its unique in other ways as well. Its did give me that epic story feel right off on the manga an the anime falls right in line. Aesthetica of a Rogue Hero for instance would be a good comparison tho arguably not a shonen.