You are correct. However, my speculation is based on the current sources saying that they will start production with 5 MTU engines, while no domestic engine was seen until now. Maybe these sources are fake.Maybe you're right but then maybe you're completely wrong so why all those speculations and rumors?
You, as all other as well me incl, have absolutely no idea what engine it is so why just not wait till it's presented?
I don't understand the need to speculate so much, nobody here is a insider so nobody knows what's really going on backstage. Just wait till official info is out, it is so simple.