It came with a minifigure book: https://www.amazon.com/LEGO-Star-Wars-Character-Encyclopedia/dp/1465489568/ref=sr_1_1?dchild=1&keywords=maul+minifigure+book+guide&qid=1621540768&sr=8-1
Yes, this is out, I pre-ordered it from Amazon
You should check out the LEGO character encyclopedia. I know they have one for Star Wars and Ninjago but they might have more also. here