I cannot wait to see the next Webcomic chapter, my curiosity regarding Watchdog Man, Engine Knight and of course Blast, is off the charts, i need to know more about them.
I found interesting that in that hero profile that they released(http://imgur.com/RZUKbbX) the rumors about Blast makes him a being that combines every ability.
Usually among the association we have physical fighters(Bang, Darkshine, MB etc), Esper/psychics(the sisters) and tech users(Genos, Engine Knight, Metal Knight and Child Emperor etc.). Blast according to those rumors, combine every trait to a maximum. Army of robots, stronger than King and psychic abilities.
And Saitama of course, needs to go S-rank as fast as possible, at this point, most heroes are aware of him.