The Change in Nobita

when i was a little kid, I always watched Doraemon along with my big sister but after we grew up we didn't got the time to watch .But one day i heard Doraemon got an official ending which was the death of Doraemon .Out of curiosity i watched the ending but I felt frustrated watching the ending.I thought if it had been me not Nobita then i could have had a happy ending.After all this that night i was sleeping and the author of Doraemon came in my Dream and asked can you give me a better ending without thinking anything I said yes In reply he said then lets do it