Ok so here is how it pieces together.

1) All neon engines are made by Dodge
2) The DOHC Avenger engine is exact same as NA Eclipse and are made by Mitsu.

The other night I was pretty sure the 2.0 DOHC was the same exact engine in both the NA Eclipse and Avenger. Then I went and looked at someones site on NA eclipses and now I am undeniably sure of this after seeing a pic of the engine in the eclipse. I already knew what the 2.0 DOHC in a Avenger looked like because my friend at school showed me his engine when he got headers and the motor is identical (I think even the valve covers are identical down to the lettering).