What's the meaning of "come down the pipeline"?
My lawyer thinks we can appeal the sentence. Not that it’ll help. But making sure this brouhaha reaches a higher court would buy us a little time. I told him I’m not interested. Between us, what would I get from that little slice of living? More push-ups in a six-by-nine cell? More college basketball and crappy reality TV? If the only thing I’ve got coming down the pipeline is a needle full of poison, let them stick me now and move on. Let’s not drag our feet.
What's the meaning of "come down the pipeline"?
Thanks!

Question

Answer

coming down the pipeline = something coming in the future.
A pipeline usually delivers something - oil, gas, etc.  In this case, the pipeline is symbolic of life.
"The only thing coming down the pipeline..." = "The only thing in my future..."
If he opened the 'pipeline' of his future life, that is  what would come out.
In this case it is a needle full of poison - a lethal injection as part of a death penalty.