this is actually a really great idea
I concur... The anthology idea would be very appealing. The focus could be the street level heros, dealing with thugs and organized crime. It would arc across several themes andplot lines, culminating to a major character cross-over.
Another TV ideas that I think would be great (pretty much already mentioned by others) is a SHIELD series, which could be a send up to an X-File theme... except, it isn't one guy who believes, it is an entire secret quasi-government agency. They could touch on the paranormal, cryptozoology (strange species like Atlanteans, Wendigo, subterrans), exobiology (aliens), endogeography (strange and reclusive locales, like Atlantis, Wundagore Mountian, Wakanda), occult and secret societies...
I am also for an x-series, or a reboot of FF in a TV serial... This would enable them utterly recreate the franchise, and get it going in the right direction (leading to a second wave of proper films, if need be).
Lastly, another anthology concept could be the dark titles... with Dr. Strange as a central figure / narrator, featuring GR, Blade, Werewolf by Night, proper Night Stalkers, etc... There is too many good ideas for a TV series...