This is all speculation, so take it with a bucket of salt.
Some of you remember that last year SNKP released a game called “KOF 94 ReBout” (soon coming for XBox in the US). It was a tenth year commemorative game. The first time KOF94 was ported. A special occasion. So, they cleaned the graphics, making them 640x480 resolution (see comparison here), added the AST from the Neo CD version (and playable Saisyu), and made some optional 3D backgrounds.
Now, some of you also remember that some compilations were announced. AOF, Fatal Fury, Last Blade, World Heroes, you name it. Included in those compilations were two KOF ones:
KOF Orochi - KOF 95, 96, 97.
KOF Nests - KOF 98, 99, 2000.
You could see those compilations even in the official “Online” site of SNKP and press releases. It was not a misprint or anything.
Back then some people were like “Wha? The Nests saga includes 98 but not 2001?”
Well, guess what? The Nests compilation has been changed, and KOF 98 has been left out. So (and this is where you pick up your buckets), could it be that theyre releasing 98 by itself?
Could it be that theyre going to do something more with 98?
Doing a “ReBout” on 98 would help them a lot. Not only on sales of the favorite KOF of 99% of the players, but also on the fact that, making higher-res versions of the 98 sprites would mean making high-res versions of sprites that could be used on future ports and even arcade versions!