So if a universal heaven exists it should be higher than all of the above. It should be something incredible or inconceivable from our current state.
I think the below concept appealed to me the most!
There is no time, space, size, shape or quantity there so your mind cannot imagine it. There is no quantity like 5,000 people since there is only one thing which is a oneness. The thing that is there is feeling. Try to imagine all the greatest feelings you have ever had coming together and all the best feelings that everyone has ever had coming together in one place. It feels like total contentment, perfect peace, pure joy, limitless happiness and endless love. When you feel it, you know that is what you have always wanted to feel or experience.
Enlightenment might allow us to reach this state in our normal lives.