Or, alternatively, it suggests that those powers were always there, but the MCU variants were not aware of them. Which is to suggest that Agatha Harkness in the MCU has the ability to drain someone's powers without being attacked first - regardless of them being supernatural or magic. And she just doesn't know it, yet.

Just like who is to say the MCU Mind Stone didn't have the ability to cut Thanos in half, and Vision just chose not to try? Like...

What If... The MCU doesn't know how powerful it really is?

That's not Mr. Terrific in the baseball stadium. I thought it might've been Mongul. Also, Guy isn't shooting a "beam of light" at the crowd outside Stagg Ind. He's putting up a screen to block the crowds' view. Also, Terrific is using his T-spheres to protect himself and an innocent person from gunfire. Did SR even watch the trailer!?