If it werent for Deception, people would think Nightwolf, Sindel, Kabal, Tanya were all "rushed" and "not well received" as well and dont even try to tell me they were popular. If it werent for Deception we would be saying the same thing about them by the time MK9 came around
I definitely agree with you here. Deception saved a lot of characters, and out of those you mentioned I think Noob Saibot be added. Before Deception Noob Saibot was just the black ninja shrouded in mystery. Now, he is Sub-Zero's brother, and one of Scorpion's greatest enemies. He has connections to characters like Quan Chi, Shinnok, Smoke, Sub-Zero, Scorpion, Sareena, etc... and he had NONE of that before Deception.
Deception the B-list characters like Jade, Ermac, Noob Saibot, Nightwolf, Kabal, Sindel, Smoke, Baraka, and Mileena (All trilogy characters might I add) and gave them importance in the story. If not for Deception all of these characters would have been virtually forgotten. It also took some of those B-listers and made them certified A-listers. Mileena, Ermac, and Noob Saibot all have Deception to owe for their prominence in the lore of MK.
I think a lot of it was leaving out some of the more popular characters. I really do. Deception didn't have Kano, Sonya, Johnny Cage, Kitana, Kung Lao, or Jax. Every one of those characters are staples in MK, but at the end of the day these characters are also not Scorpion, Sub-Zero, or Raiden. Those 3 are staples and I have always believed Sonya was kinda like the number 4 of the "Mascot characters". However, Cassie in a way represents Sonya. So, the gang of 4 (Scorpion, Sub-Zero, Raiden, and Sonya) were kind of covered for MKX.
MKX could have been a good chance at another deception, but now that Kitana has been revealed I feel like there isn't enough of a gap for the less popular characters to breathe. She will most definitely be a focal point of the story. Idk, I'm not ruling out other characters growing to prominence in MKX, but I wouldn't count on it at this point either.
We will see some new characters rise to prominence though as I believe Kotal already has. Don't expect to see characters like Nightwolf or Kabal get that prominence again.