I love both Mortal Kombat and Soul Calibur, but I'm a much bigger Soul Calibur fan so I would support Soul Calibur being in over Mortal Kombat lol
But as a rep, for Mortal Kombat, I know everyone's vote is for Scorpion, but I say Sub-Zero, just as iconic, and we already have a fire user in the name of Sweet Tooth and possibly Evil Cole. Now the only ice user would be Cole and that is only his LV 2 super. Sub-Zero would have a ice everywhere lol
And as for Soul Calibur rep, it's pretty obvious it should be either Siegfried or Nightmare. But my vote would be for Nightmare just because of his awesome design and potential moveset and to get another villain in the roster. I would be kind of disappointed if they used new to the roster Patroklos to "promote" Soul Calibur 5. It's not that he is a bad character, it's just, that Siegfried and Nightmare have been around the longest in every game, Patroklos is only the main character in the new game lol.
I perfectly agree with both Sub-Zero and Nightmare for the reasons you've stated as both a MK and Soul fan. Sub-Zero FTW!
...But I wouldn't mind Scorpion or Siegfried if we had to get someone else.
By the way, just call me Count for short.
Why Scorpion? Toro already has his only interesting move.
Sub Zero would be infinitely better for this game from a moveset standpoint. Freeze ball, ice slide, ground freeze, ground spike, freezing rain, ice clones, ice swords, and so on. They could do anything with Subby. Plus we don't have an Ice-based character (and no, Cole's limited ice moves don't count.)
Soul Calibur is a no brainer, though. Sure, I'd love to see a more unique fighting style like Ivy, Tira, Astaroth, Yoshimitsu, or Cervantes, but we all know it'll be Nightmare if there's a SC rep. I'm okay with that, though. Nightmare's awesome.
If idiots could fly, this forum would be an airport.