A week ago the new hit show The Falcon and the Winter Soldier had introduced the new Captain America, John Walker. Ever since the internet has been a buzz with people claiming he is not our Captain and even sending death threats toward the actor on social media. None of that is warranted, of course, as he is just an actor playing a rather good role. If we look to the comics for a background of the character we can clearly surmise that the character is not a boy scout much like Steve Rogers. In the comics he first donned the name Super-Patriot where he would promote his image through patriotic rallies and community service, however all these so called good deeds were usually set up in order to make him look good. He also came across the Power Broker who gave him his super strength and abilities, and this all led to him taking on the mantle of being Captain America. His actions as the Star Spangled Man were less then special. He would viciously beat villains, sometimes even commit murder and the longer he was Captain America the worse his actions seemed to become. Comparing this to Wyatt Russell's John Walker, I can see a similar action in which we see him become the over arching villain of the series for however long it may last.
In episode 2, "The Star-Spangled Man", John tries to persuade Sam and Bucky to work alongside him but is only refused. This begins to anger John, to which Bucky presses on that nerve by asking him "Is this all becoming to intense for you?" to which John tells them to stay out of his way. It is the first instance of showing the shimmering rage beneath his resolve. Even his heroic deeds as a military man seem to have been all a show and that his actions as a soldier were a bit less heroic and much more deadly. The governments insistence to make him the new Captain America most likely put an unneeded amount of stress on him that he struggles to deal with the right way, not to mention following a great hero like Steve Rogers comes with it's own baggage. In the newest episode, the people that helped the Flag Smashers spit in his face only to lead John to get physical with them and admit that they need to take drastic action in order to catch up to them. I wouldn't be surprised in the coming episodes to see John Walker continue to fall down the path of a man that struggles with rage. This season seems to have more focus on the Flag Smashers and the Power Broker as the main villains for Sam and Bucky but I can only imagine at some point after dealing with the Flag Smashers that John will come into contact with the Power Broker and receive the super soldier serum himself.
If we go back to what Doctor Abraham Erskine said to Steve Rogers about the serum in how it enhances the most dominant qualities of a given person, you could imagine what it could do to a person that carries a bit of rage in them. Looking to Johann Schmidt, The Red Skull, it enhanced his worst qualities and made him a monster. The same could be said for John Walker eventually, or it'll break his mental stability turning him into a savage mad man. It has also been known for some time that the show will show Sam turning into the Captain America, and when he does I doubt we'd see John Walker die. His character would still be around and I'd assume he wouldn't be happy to give up the shield. The two will come to blows, and when John is on the losing end I am sure he will then become an ongoing adversary for Sam. I could even see Zemo turning John into a weapon against his hated heroes. Zemo after all said that symbols like that of Captain America are dangerous, and turning the new Captain against the heroes that took his family away from him would continue Zemo's arch. I doubt they go that direction as it is far too close to what he did in Civil War, but the two could definitely end up working together as long term enemies against Sam and Bucky. The only situation that seems most likely is that of John coming across the Power Broker after the Flag Smashers are dealt with and he is forcibly stripped of the title of Captain. Here he'd take the serum to be better, or worse, then his previously self and give in fully to his more violent tendencies.