Well, I'ma pull GM bullshit and have the final say. [b]Powers will not be swapped.[/b]

@ DP, I can make a rough guess as to who is it and I can also confirm that I approve. xD
I think it'd be interesting to have Giovanni make a 'younger' cameo. 

Giovanni:...WHERE THE HELL ARE MY SLIPPERS?!
Servant: Uhm... On your feet... sir?
G:...Oh... >.>'

Oh, and as far as who gets switch with who, I'll try my best to figure out a way to make it as random as possible. Just trust me. I'm not out to screw anyone over to piss anyone off. If it happens, I swear to god it wasn't me. xD