I could see an EU threat happening soon. Like real soon, bolstered by their success with the Swiss. Here's why...
Trump isn't a staunch 2A supporter, as we've seen with bump-stocks, etc. EU threatens a tariff on American goods, especially farm products. Trump sees it as a threat to the economy, which is his biggest selling point in 2020. There's already bills being drafted in the House for an assault weapons ban. Almost every Dem presidential candidate is proposing gun control. Trump lets it out that he's not opposed to "reasonable restrictions" and "negotiates" with the EU to protect the American farmers, businesses, etc. Dems introduce an assault weapons ban in the House, Trump signals his support, and Reps in the Senate fall in line with Trump. The NRA is already in the midst of its own chaos, and doesn't have the political strength to stop it.
Hope I'm wrong, but this was my shower thoughts last night...