SC V Get Star Wars out and bring in...

[KnightWarrior]

If it's on the Wii, Mario

PS3 - Krados
360 - Spawn

 

[Pocky-Yoshi]

If it's on the Wii, Mario

PS3 - Krados
360 - Spawn

Not a bad idea IMHO.

 

[PSN-iiDRiiS]

PS3: Dante Vergil
XBOX: Ryu, Ayane
Objections? I think not!

 

[Nukemall]

If it's on the Wii, Mario

I think Lucario from Pokemon would be a great guest character for the Wii version, especially with his trademark Aura Sphere attack which, I imagine would have Unblockable properties and give players leeway with launching the Aura Sphere (e.g. launching it quickly to keep opponents at bay, or charging it up for potentially huge damage).

 

[spongebob]

PS3: Dante Vergil
XBOX: Ryu, Ayane
Objections? I think not!

I think that could sound more likely then sum of the other suggestions here lol