I think what the Germans are expecting....is that Trump wins in November....and some disagreement starts to occur with the US downsizing it’s NATO presence (more so in Germany than anywhere else). This EU Army idea though....will go nowhere. No one has the cash flow to pay for the Army, Navy and AF needed for the EU.
They’re already treating the UK as if they’re already out. And this “common defense” idea has been around for a very long time; it’ll just take another calculated “crisis” to get people to go for it.