Big hero 6 and venom

Callan was heading to his new college called SFIT but on his way there he heard a strange noise coming from an alley when he checked to see what it was he saw a strange black goo that latched itself onto Callan when the goo revealed itself eventually it told Callan that his species are called symbiotes and his name was venom then they met big hero 6 and joined there team but what Callan and big hero 6 didn't know is that venom has a secret that he's never told anybody