I'm actually working on realistic BGW recreations as we speak. I'll be doing several versions throughout the history of the park. The first year I'm doing is 1992, I'll post some screenshots soon of the progress!
I worked on on all three BGW arrows, as well as Alpengeist, so I'm trying to make them as detailed as possible. I've toyed with contacting the director of marketing to see if they would be ok giving me permissions to use a few trademarked items and access to some of their publicity photos/videos from the 90s to aid in this.
If anyone out there is very good with 3d modeling and wants to work with me, I would be THRILLED to have a nicer model of the Drachenfire trains than the b-list abominations I've made so far. I have a friend with some 400 odd pictures of Drachenfire's last season and being dismantled that I'm trying to get a hold of, and I actually have MANY pictures of Wolf that I took from inside the ride area (which I sadly cannot release due to an NDA I'm likely still under) to aid with making sure the recreations are as authentic as possible without blueprints.
Once I get a good foundation I'll move on to 1997, 1999, 2007, 1984, 1978, 2011, 2015 in that order! Hopefully by the time I get to the 2011 one, there will be an update that makes Verbolten easier to do, and I still have my fingers crossed for an update which allows for the "siderail" arrow track transfer table to make Loch Ness/Drachenfire a bit more realistic, because the scripting has proven to be a colossal pain in the ass so far.