that Johnny threw away the cane in Washinton? So there is a possibility that the future has not been changed at all.

No, because this is how Wey finds the cane. It all adds up some way, but I'm too tired to explain it.

Yes, it is a very good possibility that throwing that cane head away could change or not change the outcome. It is only one event and as was shown in "Vanguard" there is never any proof of anything until almost the end. We may see the canehead again or not. But, if we see Wey, then yes, Armageddon most definitely happens unless they somehow want to wake up Wey before events spiral out of control. John knows that Wey possesses a similar talent, as does Alex Sinclair.

One thing about throwing that canehead away was a choice made for John on "faith" that he could discover another way to solve the complexity of Armageddon events without having to take a life (assassination). FJ helped John decide that by basically rubbing it in John's face of his habit of acting only if he could "see" or "know" the outcome.

We have never really seen John's visions showing his direct involvement in Armageddon, most likely because it may be a subconscious survival instinct, yet hisi intuition or fear has been screaming at him that he was, in part, a cause. FJ confirmed that, yes, everything John was afraid of indeed happens. FJ also basically called John a coward.

If you go back to "Shadows", Bruce specifically said to meet [scary events like his murder] head on because if Fate demands certain things to happen, then Bruce was not going to allow another man or woman take that place. FJ maneurvered Rebecca to do just that as FJ said that John was not willing to make the choice. Certain events are goint to be "pre-destined" and I think that John must fulfill that part as part of his "duty". It may be going through some "trial by fire" that would strengthen John but that maybe John will not accept to do because he is too overcome with fear of the outcome. Or his rage at something destroyed an opportunity (maybe the crucial opportunity) that changed his future role to that of "destroyer" and not "savior" because Wey told John that he was very much hated among the survivors of Armageddon.

The book of Obadiah is interesting. I've always thought John as representative of "Israel". In this book of the Bible the land of Edom, where the House of Esau (Jacob's fraternal twin who was the hoary red haired hunter), was to put down.

Stillson has some parallels to John. He is the "laughing tiger", a carnivore... a hunter. Maybe an "Esau"?

Quoting from Obadiah:

2 "See, I will make you small among the nations;
you will be utterly despised

Think of what happened to Stillson in the book, of how he was "made small" before the world.

3 The pride of your heart has deceived you,
you who live in the clefts of the rocks [a]
and make your home on the heights,
you who say to yourself,
'Who can bring me down to the ground?'

4 Though you soar like the eagle
and make your nest among the stars,
from there I will bring you down,"
declares the LORD

These boasts of "Edom/Esau" are similar to that of Anti-christ/Satan in the Bible.

6 But how Esau will be ransacked,
his hidden treasures pillaged!

7 All your allies will force you to the border;
your friends will deceive and overpower you;
those who eat your bread will set a trap for you,
but you will not detect it.

8 "In that day," declares the LORD,
"will I not destroy the wise men of Edom,
men of understanding in the mountains of Esau?

The above passages describe part of Psalm 23 that describes a table will be prepared for the faithful follower of God amidst his enemies, meaning that somehow there could be protection and in the end blessing but only after the "anti-christ" is taken down.

Because of the violence against your brother Jacob,
you will be covered with shame;
you will be destroyed forever.

11 On the day you stood aloof
while strangers carried off his wealth
and foreigners entered his gates
and cast lots for Jerusalem,
you were like one of them.

12 You should not look down on your brother
in the day of his misfortune,
nor rejoice over the people of Judah
in the day of their destruction,
nor boast so much
in the day of their trouble.

13 You should not march through the gates of my people
in the day of their disaster,
nor look down on them in their calamity
in the day of their disaster,
nor seize their wealth
in the day of their disaster.

14 You should not wait at the crossroads
to cut down their fugitives,
nor hand over their survivors
in the day of their trouble.

15 "The day of the LORD is near
for all nations.
As you have done, it will be done to you;
your deeds will return upon your own head.

16 Just as you drank on my holy hill,
so all the nations will drink continually;
they will drink and drink
and be as if they had never been

This too harkens of Revelation where God allows the earth or the followers of Anti-christ to get drunk on their arrogance, greed, etc. They rejoice over their torment and wealth made by exploiting the innocents. Remember when Stillson said about John that he didn't want to seem that he was enjoying kicking a man when he was already down and the entire room of cronies all laughed?

John lost his wealth and almost his good name in season 3. Can it happen again in the future? Possibly. I'm counting on it.

17 But on Mount Zion will be deliverance;
it will be holy,
and the house of Jacob
will possess its inheritance.

18 The house of Jacob will be a fire
and the house of Joseph a flame;
the house of Esau will be stubble,
and they will set it on fire and consume it.
There will be no survivors
from the house of Esau."
The LORD has spoken.

19 People from the Negev will occupy
the mountains of Esau,
and people from the foothills will possess
the land of the Philistines.
They will occupy the fields of Ephraim and Samaria,

So, Jacob, beaten and deprived of his wealth and maybe "holiness" will arise like a "fire" and spread out and consume "Esau" and all of his kingdom to return back what was taken from them PLUS all that Esau accumulated!!

21 Deliverers will go up on [c] Mount Zion
to govern the mountains of Esau.
And the kingdom will be the LORD's

Ah! "Delivers" in the PLURAL!! More than one working together? Cool!