I don't recall the specifics so I know this is one vague request, but last year a pretty popular injection was floating around. I think it may have involved some beer.
Is that the one from Dr. BBQ's Big Time BBQ cook book? If so, I have that one and he has some pretty killer stuff in it. In fact, my go to homemade rub is a riff on his Big Time BBQ Rub..........Awesome.