Labourlist have a useful article detailing the various motions being put forward to Labour conference by different factions within the party.
As of yet we do not know which of these motions will definitely make it to conference floor. There appears to have been a significant push for the motion on proportional representation through a number of local labour parties. Unfortunately Momentum has done a poor job at getting their motions, passed through its own policy primary, through many local parties. Read more here.