If there's a proper toolchain it would be interesting - tools can be modified.
Conitec did this with DEU for A3 and Qoole as well as Quake2 Modeler (Q2M) for A4.
So it would be possible to take the best of both worlds and form sth new.

Merging to engines however.... forget it. This will not work. At least not easily.

...and I am VERY sure this will not happen.
1) I don't think Conitec will earn much extra money with this strategy
2) additional man power would be needed to guarantee that some combined kit finally reaches operational state and also the old engine needs to be updated.


--> this won't happen