The decision isn't that hard; you either join Dick and let him turn you into a vampire or you end up like the rest of the Batfamily.

The Batfamily didn't end well. And Dick wants at least one of his siblings on his side... and you're the last one left, he will not let you either way but you don’t know that.

"Tick, tock, time is ticking, little bird." Dick threatens, wiping scarlet smudges from his chin.