If you understand their M/O, you'd know they'll never make an AK, unless the US, Canada, and/or Britain adopted it as primary weapon. That however; will never happen just on the fact it's a Russian weapon. That and although it gas it's charms, it's really a fairly useless gun. It really is only popular for it's pop culture, and in third world countries because they are cheap. A few countries have designed some decent variants out of it though; such as the Israelis.
The most likely gun you'll see from Systema is the ACR Masada. That is if it's "issues" get worked out, and it's adopted as a replacement for the M series. They had talked for years about making a Scar until the US dropped it. That's why I think they've waited do long to make another weapon. They seem to be interested in whatever the US army is using. So, some realistic possibilities would be; the ACR Masada, the Scar H/L, and the XM-8. You have to remember that they don't go out of their way to go after airsoft markets.
ďREALITY IS LIKE A STONE. TO MANY ITíS HARD AND COLD, THEY CANíT HUG IT OR EAT IT, IT ONLY FRUSTERATES THEM AND DOESNíT DO THEM MUCH GOOD. TO OTHERS ITíS STRONG AND DEPENDABLE, YOU CAN BUILD WITH IT, BUILD UPON IT, OR WORK WITH IT, ALSO USE IT TO SMASH PEOPLE IN THE FACE.Ē