Quote Originally Posted by the illustrious mr. kenway View Post
Ted could pop up as Jamie's mentor. Sorta like what Bruce did for Terry back in Batman Beyond. Coincidentally both Terry and Jamie were voiced by Will Friedle.

Ted eventually retires from being the Blue Beetle so it fits.
He could, I suppose, but that wouldn't be strictly necessary, especially in an origin film. And if done poorly, it could very easily come off poorly, too.