What does the Bible say about the future?
The parable of the net
Matthew 13:47 Again, the Kingdom of Heaven is like a net, that was thrown into the sea, and gathered all kinds of fish. 48When it was full, they pulled it to the shore. They sat down, and gathered the good into containers, but threw the bad away. 49This is how it’ll be at the end of the age. The angels will come and separate the ungodly from the godly, 50and they’ll throw them into the blazing furnace: where there’ll be crying and grinding of teeth.
As you listen to any teaching, since we're all fallible humans, you must sort through all the detail presented, and in accordance with God's Word, throw out the bad and gather the good into your contemplations. I delight in casting my net wide to listen to various teachers, to gain a broader understanding. If you focus on one teacher or one school of thought, you won't understand the arguments against their understandings. I pray that those reading what I write would be guided and shielded by God's wisdom to absorb the good and throw out the bad
Jesus teaches in this story that not everyone will go to Heaven.
John 3:16 God loved the world so much that he gave his one and only Son, so that whoever believes in him won’t perish but will have eternal life.
So, those who don’t believe in Jesus will be thrown into the blazing furnace of Hell where they will suffer for eternity. To believe in Jesus means to believe that he is God. That he was born to a virgin, that he lived as a man, and died in our place. Through this he covers our imperfection that we might be brought back to life, just as he is, and live with him in Heaven for eternity.
If anyone teaches that God will not condemn the ungodly to Hell, they’re teaching fake news. Throw out such teachings and ignore such teachers as they’re only teaching what is pleasant to the ears, but lacking God’s love to present the truth of God's Word to their listeners.