@willpayton: First of all, who gave Batman access to the phantom zone? Second off all, Batman doesn't kill...like ever.
Even if we take this to be true, Batman can win without killing as I already pointed out.
With years of prep, devices, and near full knowledge; Reed Richards, Tony Stark, SHIELD, and all of Marvel's greatest minds couldn't find a way to keep the Hulk down spur of the moment.
Bruce Wayne doesn't have 40+ years of different technologies that already exist, and have been specifically developed against the Hulk. He also doesn't have nearly a lifetime's worth of paper, video, and electronic documentation on the Hulk's weaknesses, capabilties, achievements, and etc.
We have Bruce Wayne, starting from absolute scratch, trying to figure out a way to defeat somebody who has come back against almost every device he's been put up against.
Not to mention, most of the devices that HAVE worked, haven't worked against modern incarnations of the Hulk.
Thanks for reading,
Actually they already did BFR Hulk when they decided to. The fact that he came back is not relevant to this fight.
The main reason why the Hulk is still around is because he's a popular character and it's comics. No one stays dead, no one stays BFR'ed, and popular characters often have tons of PIS protecting them.
And, Batman does have all those things you said he doesnt. He has access to some of the best tech from Earth, Krypton, Apocalypse, and many other planets, time periods, and even alternate dimensions. All he even needs here is the Phantom Zone Projector, but there are many other options. For example he could create a gamma energy absorber, and do to Hulk what the Surfer did. And before you say that he cant... yes, he can. People like Batman in comics can make pretty much whatever the plot requires them to be able to make, given enough time... and 1 year is plenty of time given his resources and knowledge.