My guesses:
Lucy Diakovska (No Angels)
Vanessa Mai
Stefan Raab
Maite/Patricia Kelly (ex Kelly Family member)
Gil Ofarim
Giovanni Zarrella (Bro'Sis, quite popular Schlager artist)
Erwin Kintop
Ilse DeLange
Mark Foster
Alvaro Soler / Nico Santos
Stefanie Heinzmann
Elif
Hurts
Actually, I don't know any artists with ties to
living/residing/being based in Germany.
When I think of
, Andreas Gabalier comes into my mind but there's no way he will be part of this.
Stefanie Heinzmann won Raab's talent show and he's been a radio darling ever since. I think she's set.
It has been announced that 2 former Eurovision participatns are involved: Lucy (Germany 2008 as part of the No Angels) is basically set, she's the only known Bulgarian artist in Germany (I think) and she has strong ties to German media.
The other might be Ilse DeLange (The Commeont Linnets, The Netherlands 2014) - She's currently part of another German TV show (Sing meinen Song), has collaborated with the BossHoss and has ties with private broadcasters in Germany. She's currently released a song with Michael Schulte. This would be a GREAT boost for her career in Germany and it seems that her management is trying to achieve this.
Erwin Kintop (finalist of The Voice of Germany this year)'s father is from Kazakhstan, I think he's on lock as well.
Vanessa Mai would be huge, her father is from Croatia and she's like the biggest female artist in Germany right now (minus Helene Fischer).
I know that Hurts for
is a bold guess but actually, they are about to drop a comeback single THIS FRIDAY ("Voices") and they have uploaded several cryptic messages on their social media accounts and apparently, they say that a "live performance" follows "very soon". Hurts' biggest market is the German one: They have kicked off their entire career in Germarny (recording their album, music video, live performances) and they are more successful in Germany (than anywhere else) - I don't know if it's possible for them to come to Germany but if I were their management, I would try to get them to Cologne to take part in the Free European Song Contest ASAF!
Some might now Elif (Turkish/German singer) due to WorldVision.
Gil Ofarim would be my guess for
- He's quite known and just released a comeback album 3 months ago (which reached the German Top 5!)