My understanding of generic threat in Europe:
There's 10 years regulatory protection from approval (presumablu around Jan 2021. I believe EU patents run to about 2033.
There can't be a European version of the Du-bacle because that involved the niche (trigs >500) indication that does not exist in Europe, and there's 10 years of regulatory protection. On top of all that, if by some devilish magic there were a trial, we now have much more info (the statistical paper Bhatt co-authored, etc) and would be able to defend much more effectively.
If something is going to go wrong in Europe, it seems like it would have to be something else besides early generics.