Considering that the LCMS statement on the Pope is that he is an anti-Christ, I’d say there’s a bit of negotiating that may not go so well.
Well, the problem is that we should not over-simplify or just take a journalist word for it. the LCMS position, while not "Oh, yay Pope!" is neither "Bene has horns"
From their website -- www.lcms.org/Document.fdoc?src=lcm&id -- they say "The LCMS does not teach, nor has it ever taught, that any individual Pope as a person, is to be identified with the Antichrist. we affirm the Lutheran Confessions' identification of the Antichrist with the office of the papacy whose official claims continue to correspond to the Scriptural marks listed above. It is important, however, that we observe the distinction which the Lutheran Confessors made between the office of the pope (papacy) and the individual men who fill that office. The latter could be Christians themselves. We do not presume to judge any person's heart."
Note -- I am Catholic and I don't like the "we identify this with the office...", but that's their opinion and it's not a simplified 'Bene is the anti-Christ'.
Cold comfort, but there you have it, we're not in unity, but we can work together to better understand each other and as the LCMS themselves that they would re-evaluate, it's not a fixed deal.