Would be nice to be able to see optional Redprotect and Worldguard Regions like it is possible with Dynmap

Hey :)
I won't add support for any mod/plugin directly into BlueMap, but there is an API that can be used by any developer to create either support for bluemap, or a bridge-plugin adding the markers.
The API is already supporting region markers :)
I myself will not work on any bridge-plugins for now.

(Also, there is already one unofficial bridge-plugin for worldguard that i know of: https://github.com/Mark-225/blueguard)