Saw the trailer yesterday, liked it a lot.
I think it seems to match up a lot with Deja Vu.
a) there's a bomb that kills a lot of people,
b) a secret government project can try to find out what happened with a sort-of time travel device
c) in theory it can only look back in time, you can't change anything
d) however the male hero decides that's not good enough and decides he wants to save the potential love interest
I think the Quantum Leap-style approach looks more interesting here, though, & it should be an excellent film. Let's hope.