Is Jesus really coming back?
No. There have been literally hundreds of prophecies of the return of Jesus and none of them ever came true, yet people continue to yearn for his return. Strangely, after some two thousand years, these yearnings and expectations are always that Jesus will return within the present generation.
The world will go on for thousands and then millions of years. As long as there is still a Christian religion on earth, people will continue to yearn for his imminent return, but these expectations will never be fulfilled.