Think about it. Due to legal reasons, K9999 is never allowed to appear in any KOF games post-'02. And don't forget the fact that Angel follows K9999 around to the point where she can't even be considered as a single entry (plus, she's incredibly difficult to fight as). If the SNKP staff has Ash kill off the two of them (in, I don't know, maybe a cut scene?), it would certainly give them a viable excuse to never have to deal with those two ever again.
