I think if you were to believe in becoming someone or something once again, then yes, like your memories, your consciousness would be gone. I think this because I think your consciousness is inherently tied to how you sense the universe and your own being, and that will obviously be different if you once again exist as someone or something else.

As a result, if you choose to believe you will one day exist again after you die, in order to make a connection between one or more consciousnesses or lives, you would need to invent something to explain it. Like a soul.

You could make thinking about all this even more wild by thinking about how time is involved in all of this. We are assuming if that you exist again it must be some time after you cease to exist. What if you exist "again," but at the same time you exist now? Are you also another person somewhere else? Is there another universe with another you? When you die do you then relive the same existence again? The questions are as limitless as our imaginations because we have no answers.