It’s a stretch, but we could eventually get to see Johnny Blaze show up in Agents of S.H.I.E.L.D.
The poster could be foreshadowing of an upcoming appearance by Johnny Blaze on the show.
It’s possible that the previous owner was either a fan or a worker at Quentin Carnival, and there’s no way that somebody connected to Quentin Carnival could show up without having some sort of relationship to Johnny Blaze.
Agents of S.H.I.E.L.D. didn’t go into detail about the person who owned the house and posted the poster.