...any plans to do Nationalists or any other infantry sets in the future?
For sure. Only that we haven't got room enough in the Pipeline for showing these. Let me explain future plans in few words:
First of all, we'll try and put on tabletop all the most basic stuff. That is, what is needed for having two armies kicking hard at each other.
1 - Republican Infantry (done)
2 - Republican Command & Weapons (doing)
3 - Republican Field Artillery (thinking)
4 - Republican AT gun (planning)
At some time during development of this first series (most likely between 2 and 3) , we're going to start its Nationalist counterpart:
5 - Nationalist Infantry
6 - Nationalist Command & Weapons
7 - Nationalist Field Artillery
8 - Nationalist AT gun
Once both basic series are started, we're then going to descend into more specifical troop types --always developing them by the pair, i.e. one Republican and one Nationalist alongisde.
On the Nationalist side, the most likely series to be developed at this stage is Italian
Corpo Truppe Volontarie, or CTV.
Otherwise, there are two immediate alternatives on the Republican side:
A) Republican Women (I mean, not just
milicianas but also female Sanitary personnel, war reporters, drivers...)
B) French International Brigades.
As you can imagine, this is not a matter of just a few weeks --but a bunch of months instead. A little patience is required

Lluís