I agree, but Embraer is partially owned buy US companies, Bombardier has US partners too, in my opinion they will make alliances depending in how their individual programs fair, the C919 in the lowest niche competes a bit with the CS-100 and E-195.
I think everything will depend in the market, the companies that succeed the most will lead, the ones with the most of troubles will supply parts, but i guess Embraer will prefer western partners since they shunned the Russians a few months ago, that it forced the Russians to say Embraer is an american company