Has Batman ever sacrificed himself to save Supes? Or come close with intention? I was curious if he had!
Any universe, but comic source preferred and encouraged.. Thanks!
...not in comic books (as far as I know), but in the animated film Superman/Batman: Public Enemies.
From the plot summary at the Batman Wiki:
Toyman has built a rocket to stop the meteor, the appearance of which is that of a giant, robotic Composite Superman. Lex arrives to stop the launch and kill Superman, disabling the remote guidance systems. Batman volunteers to fly it himself, despite Superman's protests. Though initially faring poorly against Lex, Superman flies into a rage after seeing his best friend sacrifice himself, easily tearing apart Lex's suit. Batman, meanwhile, succeeds in destroying the meteor, surviving thanks to a small lifeboat built into the rocket. Superman carries the craft back to Earth.
In the end, Batman survives, but he definitely intended to sacrifice himself.
A few times. The two that come to my mind are:
The animated movie Superman/Batman: Public Enemies, where
Batman hijacks a "rocket" and rams a Kryptonite meteor with it to prevent it hitting Earth, sacrificing himself in place of Superman.
And the Justice League Unlimited cartoon, episode The Doomsday Sanction:
Batman: Nothing? What if Luthor does become President, like he did in their world? What would stop you from doing what that Superman did?
Superman: There's always that Kryptonite you carry around.
Batman: You don't get to joke! Not today. I just took a bullet for you.
I don't remember if it ever happened in the comics, though. Most likely.
In the finale of "Justice League" (before it became "Justice League Unlimited"), Batman piloted the Watchtower on a collision course with the Thanagarian gate fully intending to sacrifice himself for everyone on the planet (including Superman); he didn't expect to survive because the rest of the League was busy fighting the Thanagarians and wouldn't get to him in time, and he needed to maintain control so there was no way for him to make an escape in time. He only got away because Superman did manage to reach him in time and get him out just before impact.