Toni, have you watched any of GOTHAM ?
@Ome, yes I have, and I am waiting for Season 3 to start here in Spain. It´s a different kind of superhero show, but it´s a huge guilty pleasure! It does well the prequel focus though it doesn´t rely on Batman-related guest stars. It´s all about the atmosphere and the hints at what will come, which is not too far from "Smallville".
Purists think it doesn´t handle the comic-book basis right, but it´s thoroughly enjoyable and it is set in a world of its own, with amazing FX to recreate a corrupt city and tongue-in-cheek dialogues. You don´t have to know the Bat-universe but it helps. And the actors are great, especially the supporting ones. Jada Pinkett-Smith is outstanding: you really wonder why she wasn´t as fabulous in her other roles...
Since it only has 3 33-episode seasons so far, I´d take it easy with "Gotham", maybe pausing after every cliffhanger, which are huge too! And, well, if you watch it then you´ll see familiar faces too. The cutie from "The OC" does a fine job despite all the criticisms (though sometimes he looks a bit lost TBH) and there´s also Anna from the "V" remake, who is gorgeous and a great actress too.
It´s a lot darker than "Smallville" and "Supergirl", but that´s what Batman is known for in the current years: darkness.