No rumors or anything yet. General consensus is that it seems likely they'll want some operational history / knowledge for the new SWGE rides before introducing upcharge events such as Early Morning Magic or Disney After Hours. At the moment the new ride - Rise of the Resistance - seems too volatile for either type of experience.
I'm sure the upcharges are coming, just a matter of time... but my guess is it will be awhile.
Also worth noting I'm not so sure that the SWGE rides are really conducive to an EMM format, at least as they have traditionally been configured with only 1.5'ish hours. Since time is so short, EMM works a bit better with quicker on/off rides, generally speaking.