En tout cas l'ami Chris Priestly confirme que quelquesoit le contenu du DLC, l'Extended Cut est bien l'ultime fin du jeu. Donc aucun impact
" We have said repeatedly that we will not be doing more endings for ME3 and that the Extended Cut is the "end of the endings". People refuse to believe me, which is fine as I have been known to not tell the whole story, but do not blame me because you choose not to believe"