Maybe in the future they will be in an MK game, maybe on the PS3 or 360...

Something like that I hope...

No you don't.
Usually, when you can say/see everything about the highest entity, you kill the story/game. You do not want to bring the elder gods into this game until say.....the one being has already been awakened. And then they put him back in his place and we start all over.....again. Only then do I want to see an Elder God in this game, and only for that reason. And Only for that short period of time. Then they can change forms/faces and go back to being annonomous entities again. But nothing else.
What you don't know, in this case, will not hurt us.
Don't get me wrong, I am intrigued as well, but not so much if it means what history has taught me. I'm o.k. with not knowin' that stuff.
Bring them out when the game sales plummet or somethin'. That's when you play that card.

I believe they were seen in Onaga's unlockable MKD ending depictions: They had taken the form of green dragons very similar to the MK logo - it could be assumed that this is their natural form, and the logo is molded after them.

Well the backwards talking in MKD did say "The Dragon Symbol is the Elder Gods in their purist form"