Considerations when cooking a turkey that was labeled "basted with real butter"?

I've roasted numerous turkeys numerous ways, but never bought a turkey that was basted with butter. I've always just bought a regular turkey, usually I brine it, and then roast it. I've always had great results. As I've never thought to buy one, I've never given it any thought.

I got this turkey for free and am wondering any considerations I need to account for with this pre-basted turkey? What would happen if I brined it?