I have no idea who Lady Antebellum is :/
But I'm going to be optimistic and say that it's possible this time around, it really is. If I recall correctly, they were the first topic on twitter to break through the Royal Wedding mania when the drummer was announced, they've made a tonne of new fans with the festival appearance at High Voltage, and (don't quote me on this) they were number 6 on the Amazon pre-order charts last week. That, with all the drama, snippets, and interviews has really added to the hype. People who may have been doubting DT these past few albums will give the new album a try, even people who aren't major fans of DT will be intrigued by the new sound.
They have a chance, they really do.