Well we can finally reveal what the project was about, April Army member and long time friend of Dead by April, Janine Franke put together a project whereby fans of the band could contribute a paragraph of text which would be featured on a large banner. The banner (seen in the image) was then handed to the band live on the stage - featuring thank you messages and messages of support from fans across the globe.
Janine wrote as a thank you to those who participated:
Just wanted to Show you a short Video Marcus R. Made with my smartphone at the moment we presented the Surprise to them.
They were totally happy about the surprise and Thanked all of you. They really loved it and after the concert I gaved it to them so they can read it when it's time.
I just wanna Thank everyone who was part of this.
Take care everyone
I think I speak for a lot of fans to say that Janine did a very good job of this surprise, so well done to her!