Good, this is the biggest weapon of Arminianists against Universalists!
But for continuing the human race, God needed someone (Lucifer as person in the Bible)
to fulfill his Plan, as he mentioned in the Bible that he is the creator of both light and darkness, from the beginning he took
all the responsibility of our pains, sorrows, difficulties and …
The question is about the GOD’S SOVEREIGNTY VERSUS MAN’S FREE WILL and GOD’S PLAN
Bible mentions he had a Plan, so Satan is the part of the Plan!
There is absolutely nothing that exists or can exist outside of God’s sovereignty, which includes Satan.
Many don’t believe in him and this does not mean they will go to hell, he doesn’t expect them to believe him now,
one day they will believe him too, because he desires to do that!
Why Satan will be chained for thousand years? because God knows it is difficult for many to overcome Satan,
this is an unjust for us and even for God (but he is justice) that he created an enemy for us more powerful than us,
then for example almost 90% of the world consists of wicked people and only 10% will go to heaven!
That means few will be chosen and will REIGN with Christ to tell the Truth to those who will survive the tribulation! (by the will of God)
I noticed some of the Bible interpreters (like Ernest L. Martin) found a word (LOTTERY) in Gospel of John I think (I don’t remember),
I should review again, may be it was in another Gospel, I mentioned John because his Gospel is the Oldest.
for word LOTTERY I can say God chose all of us before the foundation of the world by Lottery (RANDOMIZE).
for example John was chosen to be one of the Jesus’ Disciples!
AMAZING!
All will be made Alive in Christ but EACH one in his own order, and the rest of the DEAD will be made alive in Christ in 2nd resurrection,
again BY THE WILL OF GOD!
Really, what is the purpose of destroying many and let few enter the Kingdom? 
God is the God of living, not Misery!
He gave Christians the Glorious sign of his Plan (the Bible) which many didn’t understand it, (again by his will, he can harden or
open our heart by his will, according to the Plan!)
why All these years these manuscripts didn’t vanish? because of God’s will!
to fulfill his Plan: to preaching the Gospel of the Kingdom in the world, then expecting the World END!
Our salvation occurs because of the sovereign will of God and not because of the fallen will of man.
John 1:13
Who were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God.
Salvation is not a matter of chance; first chance or second chance. Our salvation is the most glorious gift to us from God. Our salvation is one hundred percent the work of God’s grace from start to finish, and man is in no position whatsoever to boast about any aspect of his salvation. Each person is entirely dependent upon God for his salvation and all the glory goes to God. 