Yes. He was her opening act a while back ago, and there have been tweets from him and her confirming his work will be on the next album. But apparently it'll be minimal
He needs to produce her full album. The production on her last release was very sub par, esp when compared to her earlier tracks. I feel like when she came out it was like "Cool, innovative and edgy." Then with her last release it was like "hmm..." The only explanation I can come up with is that she wanted to separate herself from being just another "trendy" artist and wanted to have a more "timeless vibe" attributed to her. Anyways, Zedd is very forward and modern with his production techniques and has such a lovely clean and powerful sound with still having a bit of tasteful edge. Him and Lucky Date should team up on the Gaga album, that would be ultimate in my opinion.