Jschlatt is a Twitch streamer that was previously rumored to be joining SMPEarth, but has not appeared on the server.
A Reddit post by JoshA20 confirmed that although Schlatt was welcome to contact the developers, he had expressed that he did not wish to join the server, wanting instead to re-vitalise SMPLive.
Jschlatt also expressed that he has other commitments that he wants to focus on first before starting SMP Earth in his Master Plan livestream and his Diggin' in a Straight Line livestream.