is this from miles morales game or spider-man 2? I dont remember any new media on spider-man 2 besides the announcement trailer.You will control them both in the same environment like kratos and Atreus, you can offer commands to one or the other depending on who you’re playing as. You can seamlessly switch between them or order them to do takedowns, use special abilities (miles can venom stun people for peter to take down), team combo and take down attacks like we saw in the teaser.
When you fight bosses like Rhino or Venom you will have to use both in conjunction to exploit weaknesses.