What is the hero level limit?

Reason that I’m asking this is that I have been invaded by a level 1000 (one thousand) two days ago but the highest I have seen after that was 259.

Yep, 1000 is the limit. For now.

1000 is the limit. If you refer to the weekly blog, you will see there are five players
who have reached that level.

Wow, that’s dedication! Thanx for your answers.