In Planet Sheen, Sheen gets a new love interest, the alien warrior Aseefa and Libby sadly isn't mentioned or brought up at all. It is unknown if they were still dating at that point. This was panned by many fans of the original series who supported Sheen and Libby's relationship (and for Sheen acting totally out of character). However, The Tomorrow Boys implies that Sheen did return from Zeenu and probably fixed his relationship with Libby, but the future could still change. It is also said that Planet Sheen might be non-canon, but nothing is confirmed.