I think honestly what I would do is take all of the coolest technology we have now to, like, 1950. that would contribute a lot to advancement! and then when it came time again, I'd take all the coolest technology from the new 2014 back to 1950 as well, and so on
Burn the guy
I would kill Riddler before he screws up the world.
You can do anythingI would bitch slap Riddlershoot his assand stab him