I wish that WB/DC explored '70s Batman more.
It seems as though that era of Batman is almost completely forgotten (I did like the animated movie Batman: Soul of the Dragon that came out in January). 1970s Batman was a nice balance between the campy Batman of the '60s and the dark & gritty Batman of the '80s to present. I also love the blue and grey suit of this era, it's a classic. Nowadays, they always have Batman in the all-black suit in live-action (not even the iconic black and grey suit).
They really need to switch things up. However, WB executives don't know to properly do anything relating to live-action films (for the most part).