So, we have both Reich and Union alternate troopers.

I mean, we have the core box ones, and then the troopers mini expansions.

Do you guys think FFG will/should release alternate colors for the two other factions?

We already got a discussion around this subject, see

http://www.fantasyflightgames.com/edge_foros_discusion.asp?efid=48&efcid=1&efidt=571158