I'm sorry to say that without a regulatory block on this, you can kiss quality online investor relations communications in Europe goodbye.
No one can compete effectively against Thomson Reuters. They own both sides of the business, the investor side and the corporate side.
The regulators in Europe and the US had their chance to address this when Thomson bought Reuters. They failed then and I suspect they will fail again.
Lots of smaller IR web development firms in Europe will close or find new markets within a year of two of this deal closing. I saw it happen in the US and it will happen wherever Thomson Reuters decides to go.
I'm afraid you are right. Especially in Scandinavia Hugin is a leading provider for online IR. The influence in Germany is imho not that big, because Hugin's market share is maybe 2% (my own estimate).
A next logical step for the Thomson Reuters PacMan would be the takeover of EquityStory. They are listed and in a leading position in Germany.
Not really a good way of standardisation...