The Happy Prince (Oscar Wilde Biopic Film)
New film! He's filming in Bavaria, Germany with Rupert Everett and Colin Firth! Yay! http://m.screendaily.com/5109716.article
Also it looks like he's a main actor, according to these:
http://www.betacinema.com/media/files/pdf/BetaCinema_Lineup_Cannes2016_final.pdf
http://downloads.bbc.co.uk/bbcfilms/live/bbcfilms_brochure.pdf