When is Frontline coming back?

TeriyakiTanker: So the only news we got was from tankfest in which they stated they were working on optimizing it and wanted to bring it back before the end of the year.  Basically said they don't want it to be a permanent mode but an optional mode that comes back at regular intervals.  I did not see any word on what tier or tiers they were considering for it or the frequency with which it would be coming back.