it would be a nice move to implement her into an expansion (appears in jk1 addon - appears in jk2 addon), if any addon will be made at all, because i've read that neither raven, nor LEC have plans for an expansion at the present time.
i agree it would've been at least a nice gesture to mention her. kyle said once: "you know i don't like this force buisness anymore". instead, he could've said: "you know i don't like this force buisness *talking to himself* since i fell to the dark side and mara had to save my butt"
but i think she wasn't mentioned because raven developed the game and the raven guys don't have such a "emotional connection" to mara (since mara appeared in MotS, a LEC game, the LEC guys sure have a stronger connection to the character).