Now with the EU somewhat dead or at the very least a bit weird, certain characters might not show up at all (massive thanks to FFG for having some HK-47
). Within reason what characters are you worried about now.
For me not getting Kyle Katarn as an ally would really suck. He is a character from my childhood having played through all of the Jedi Knight games. Him showing up would only happen after Episode 6 and that part of the timeline is a bit messy now.