We know relocation and ability to choose your own team name, logo, uniforms will happen and will be on next Thursday's stream.
They also mentioned at the end of the perfect/perfect stream "full minor rosters" will be discussed next Thursday. If they are introducing full minors it is logical to expect they have changed scouting and the June draft because there are currently only 6 or 7 rounds which isn't enough to populate a franchise with full minors.
New franchise features seem to be:
Relocate and re-brand your franchise.
Full minor rosters
Possible scouting changes
Possible expanded June draft.
For me the franchise relocation is something that has been high on my list for a long time. I'm looking forward to mlbts 20.