I will post soon about Arslantepe, but before that You can read this text about Isuwa. Isuwa was the name of the country where Melid ( Arslantepe) was situated.
Notice the migration at 3200-3000BC really occured. They were Kur Araxians. Wether they introduced IE languages in that region is less clear for me.
Also the genetic impact of this migrants was not as strong as one would imagine based on archaeology.