Draco 69 has unearthed that Marvel may be vunerable to electricity; strong enough hit changes him back to Batson. Thor shocks him with lightning he calls down, what could happen? Haven't seen proof with standard lightning - just have Kingdom Come and DC/Marvel Access to rely on. But it looks like he could pick up mjolnir, too.
Strategy here is important. Marvel doesn't have obvious holes to exploit, but might not survive a Godblast. Still thinking about this one...
I dont think thats the case. Im assuming Black Adam and Captain Marvel both have the same properties to changing back and forth. Cap used BA's lightning to to jumpstart him and change him only because they have the same power source.
Dr.Fate tried to use magical lightning to change BA, but it didnt work, so i highly doubt thors magic could.