Well, about a year and a half ago, give or take some change, you popped into this universe and made a home for yourself, got in tight with the Batfolks, et cetera. And strange things tend to happen for no apparent reason, so in this particular case, people have been transforming into different... versions of themselves, if you will. The self that made a different decision, that had a different thing happen to them.
So the you that you think you are (as opposed to the you that you physically are just arrived.
And Batman and Robin are not as you know them right now. Ever heard of Adam West?