Rockzilla, I know what you are saying: if you only hit them on the ground the whole time in the corner- spear, (wait), HP, HP, U+LP, spear; then YES, it will only work Vs Sheeva, etc. *BUT*, if you understand what im trying to say; by catching them in the corner, while opponent is IN THE AIR, without the spear first, so its HP, HP, U+LP (ALL IN THE AIR in the corner) then you CAN follow up with a spear Vs ANYONE... they never toutch the ground! Its different than if you are both on the ground and you preform the combo. They will be high enough up to make this possible. "juggle/catch" them with the spear. They are still in the air; thus unblockable, thus Vs ANYONE.
You never got a combo off, with ANY character, with the opponent's back to the wall and they try to jump straight up, and you already started an auto combo, but you catch them in the right frame and do the "whole" combo "juggling" them? Its almost like a glitch. It lets you do the WHOLE dial-up, with no push-back, with each hit "keeping them in place" right in the air about head level against the wall. The last hit will push you back of course, but you can quickly cancel the push-back with a special (like normal). With this method, you can actually do either other of scorpion's combos (HP, HP, HK, B+HK OR HK, HK, LK, LK) and catch them with a spear at the end BEFORE they hit the ground because each of those combos are exactly 4 hits= you can still throw the spear... Vs ANYONE.
There should be a name and description for these wierd corner "wall-juggling complete dial-ups" somewhere. It happens quite often actually. And if a particular character's combo is within a certain hit limit of one of their specials, then there are potentials for combos that normally arent possible... or at least not mid-screen... I'm talking about dial-ups that are NOT pop-ups, but of the knock-back type where juggling afterwards usually isnt possible... if you "juggle hit" them with a pop-up combo against the wall as described, the last hit, the actual pop-up strike, will push you back and you WONT be able to cancel into a special or "recover" until they hit the ground.