the problem would be : how will it cover Kratos' and Zelos' story and character development?
until the possible animation crew create another story which will grant them justice without any disaster
it would be rather awkward to animate the end of TOS (would they be able to correctly portray how twisted is really the "villain" of the story to begin with?)
while zelos has the best character mojo, kratos is the most interesting character, plot wise, even better than the
*sigh* anyway, yeah, TOS deserve an anime ^^
note : i can't understand why in the hell every TOS summary, even from namco/nintendo spoil the 2 worlds plot. the mana balance shouldn't be that obvious at the beginning of the story.