Never relocate. Aside from usually being illegal, it's also cruel to the animal to drop it off where it isn't familiar with food, water, shelter, or being in another animals territory.
I had to look up if opossum were native to north America. Turns out there is one called the Virginia opossum that is native and the only marsupial species native to N. America.
If it weren't for having chickens, I would consider them garden friend because of eating bugs, mice, and rats. My dogs caught one once and I thought they had killed it before I was able to stop them. Then I realized it might be playing possum and returned to check it. Sure enough, it was breathing. That was before I had chickens here. So I just left it alone and yep it was gone several hours later.
With lots of research though, I knew what I had to do for my coop to beef it up. I know it's a possibility... but I don't really worry about break ins and we have way more raccoon than possum, at least that I'm aware of. My dogs aren't LGD, but they still patrol and let me know when they hear something going on so I can respond. So it's layers of security.
Also, possum DO have natural predators. This is a copy and paste..
"The opossum has a number of natural
predators in it's
environment although the main
predators of the opossum are
birds of
prey such as owls and
eagles,
dogs, foxes and
cats.
Humans are one of the main
predators of the opossum as they hunt them for meat but the opossum is also commonly killed on the roads by cars."
I still agree with everyone who says dispatch that possum and don't give it the opportunity to eat or maim your chickens.
Nice catch and good luck!