Here's a softball story that will almost certainly never develop into anything beyond "Gee, that'd be neat!" Regardless, it's a weird and interesting crossover idea.
Rod Fergusson, the head of studio The Coalition and the lead on Gears of War, would like to see a beloved Gears monstrosity in Monster Hunter:
via destructoid https://www.destructoid.com/gears-of-war-head-wants-the-brumak-in-monster-hunter-501977.phtml