That everyone is going to heaven is the greatest reason ever to repent!
That everyone is going to heaven means that we have a God who practices everything He preaches. He tells us to forgive everyone, and He does the same – even though He has infinitely more to forgive than any of us do!
That everyone is going to heaven means that we are all going to be with Him one day in heaven and will be accountable for what we did on earth – especially once we heard that everyone is going to heaven. Did we live a life of appreciation and gratitude for the mercy we have been shown? Did we cease to worry about all sorts of worldly cares that don’t matter anyway? Did we put aside all the petty differences we have with others in order to live in celebration of our eternal destiny?
I cannot imagine anything I could learn about God that would make me want to repent more than learning that everyone was going to heaven.