FrenchBaguette190
From the moment he found out about the time machine, Bucky knew he would lose Steve. Steve never truly belonged in this century, and Bucky could tell that he still longed to return to Peggy. So, when Steve didn't return immediately from putting the stones back in their correct times, Bucky wasn't all that surprised. Heartbroken, yes, but not surprised. But because Steve tampered with the timeline by getting married to Peggy, the world that Bucky knows is crumbling around him. People were disappearing, wars that he never knew existed were destroying cities and even countries, and his friends, The Avengers, were the only ones that remembered life before Steve changed it. So, with the remaining Pym Particles, they send Bucky back in time to fix Steve's mistake before it is too late.
Now, Bucky just has to convince his best friend to leave the love of his life to come back to the future, where he is unhappy, and has just lost 2 of his closest friends.
Easy, right?
(PROBABLY DISCONTINUED BECAUSE I HAVE NO TIME TO WRITE!!!)