If France wants the European Union to be a military power, there are two things that only France has and will have to share, one is nuclear weapons (I am glad to see that this is beginning to be considered) the other is the permanent seat at the UN, it can still be a Frenchman who sits there, even name it France, but it must respond to the interests of the union and answer to the commission
Without these two things together, the EU will never be a superpower on a par with the USA or China.