Hello there,
Nextcloud maps rules ! It already provides a lots of great features !
Being able to display 
Events on the map, as annonced as a future feature on the maps app home page, is going to be really great, especially for organisations.
Is there any idea of when this could be planned for ?
Thanks a lot !
Guitch
It is part of the 0.3 release, check out the road map:
The ticket is open for quite some time:
Unless you implement it yourself, it is not possible to predict when someone has the time to do this.
If you have a github account, you can give it a thumbs up to show your interest and subscribe to the issue, so you are updated when something happens on this topic.