UFC Fight Night Overeem v Volkov: Weigh-Ins Photo by Chris Unger/Zuffa LLC via Getty Images

With UFC Vegas 18 just hours away, MMA Fighting’s Mike Heck, Jose Youngs, Alexander K. Lee and E. Casey Leydon break down the top storylines ahead of the UFC’s return to Las Vegas, including the heavyweight main event between Alistair Overeem and Alexander Volkov.