I take it this means there will be dates added but not yet, no?
I think it stands to reason that there will be more dates, apparently going all the way into 2017. The band doesn't have dates for Asia, Oceania or South America, so I think it's almost a given that dates will be announce for those regions. And there's a lot of Europe that has gotten missed on this present leg of the tour, so perhaps they'll go back and play in several of the cities that they didn't this time around. Maybe they'll go thru North America a second time and even play in the south which seems to always get passed over for the Evening With shows.
What will be interesting is to see whether they just continue to perform TA in its entirety or if they will be changing up the setlist when they start going to some of the same territories they've already played. I hope that as the tour progresses, the band will loosen up and we'll start to see some additions/changes to the way some of the songs are being performed so that it's not a (close to) carbon copy of what's on the album. Only then do I hope they'll film a show or two for video release. IMO, they filmed the BtFW release too early in the tour, so that stuff like the improv at the beginning of ToT wasn't documented.