As in Daniel 7, and with the bond described by Jesus in John 17, God will not only restore the creation to what it was before the fall but better. He will set up a Kingdom on this earth which bridges the realms and will give it to the people He loves. The exalted God made Himself known through humility, and the humble people- from every nation- will be made known and exalted.
Why do we exist? To be loved and to love. To become one with God just as Jesus is one with God in love (John 17 ). You will be sanctified and prepared to receive your position as co-heir of a Kingdom with Jesus.