Galaxy is right about your brother needing support in this critical hour. I believe the mere fact that you show up will lift his spirits, because, in his condition, all the petty things between siblings disappear.
I'm sure he is scared and contemplating his mortality now and it is also an opportunity for you to show him how much you care. Unfortunately, if you do not connect with him this one last time, it may haunt you the rest of your life. I know from experience.
My younger middle brother and I were estranged from each other for over 20 years. When our father died in 2001, we got together for the first time in many years. But, we went back to our lives and then, in 2003, our whole family had scheduled a holiday together, but he couldn't attend because of work.
We missed him and I was looking forward to talking with him and mending our fences. That was in February and, before I was able to see him again, he died of a heart attack. I implore you to make the effort and let your brother know how you really feel about him.