The only way i can see the BE & ACC merging is if those two conferences are severly decimated by Big10 & SEC poaching.
This would likely mean that Cuse, Maryland and possibly Pitt or Rutgers would have been taken by the B10. And Florida St, WVU and maybe even Miami taken by the SEC. Those schools could be replaced by Kansas & K-state and maybe even Missouri (if sec doesnt take them), and to be brutally honest, i would like to see the BE, weather it merges with ACC or not, drop S Florida (its a Conf USA type school & doesnt belong), and even the lowlier b-ball only schools like Depaul, Hall, Prov