CBS-Viacom Merger Stumbling Block

According to reports, the possible CBS and Viacom merger is warming up.
Executives now have to finish off company valuations.
CBS could then buy Viacom in an all-stock purchase.
Leslie Moonves, head of CBS would become the CEO of CBS/Viacom.
But there is a stumbling block.
Analysts recently predicted a brighter future outlook for Viacom, based on new management changes. This would likely increase their value.
But Comicbook.