I really hope so.
for the moment it doesn't seem to work; can't connect on two different Google accounts at the same time and whenever I launch the two at the same time, one or the other( the first I launch actually) crashes. so Unless I bypass the "Google play games" barrier I can't play on both of my accounts unfortunately...
You gave me the idea of playing dcj and dcg at the same time on splitscreen, which workes like a charm. So thanks for that ^^