Originally Posted by chamber-music
SFX magazine had some speculation that Bucky will be breainwashed and become Winter Soldier under Hydra instead the Soviets.
They're not alone in that speculation.
In the MCU, it makes more sense for it to be HYDRA, since Bucky disappeared in HYDRA territory....they would've been the ones to find and capture him, not the Soviets. And it wouldn't make any sense for the Red Army to find an American soldier out in the wilds and, rather than simply return him to his unit, instead choose to brainwash him to become a mercenary assassin.