dunno - no released info on that count (and do they know for sure, considering they haven't put their first units together based on what they've told us?).
It certainly makes deciding on what type of battery kit to assemble a bit more difficult, especially if you want to avoid the "wholy crap this camera just ate my battery in 10 minutes!" scenario like can happen on an F900/3 with a run-of-the-mill v-lock