Given that starter boxes usually have a legal lt. option that makes me believe the lt. in the box will be a Wildcat. The models are due for a resculpt and a later release of a Wildcat SWC makes sense if the fifth man of the core team was already released. 3 Alguaciles for the line trooper option, then maybe an Evader and Sombra to get something new in the box.
I would love some alternative style sculpts. Works well when that's the only member of that troop in a fireteam.
How long? How long is a piece of string. About as long as PanO players had to wait for a Tikbalang model so they could play Toni Macayana without a proxy (only to have that profile killed anyway). As long as you think you would have to, then a bit more.