Hell, they have offered these before and then said they were removing them forever (a bit like those limited time skins that came back). I notice they have not said that this time, so we can be pretty sure that they will be offered again.
This. My best guess would be they do it at every new expansion.
The reason why I am not buying is that there is not the slightest hint about what they intend to do at all. I mean, seriously, 175 Euros, and NOTHING about what you're going to get? I've driven cars that cost less than that.
For all we know, they extend the game maybe 1 or 2 years with incremental updates that are mostly free. I wouldn't have paid for wings but skipped them, same with CQC, same with planetary landings, same with powers (here, have another alley to grind down!). I'd be willing to pay a monthly fee for the servers and ongoing development, but I'm definitely not dropping 175 Euros on two or three expansions I'm probably not interested in anyway. I'd rather invest in them fixing the main game's multiplayer aspect and get rid of the stutters.
EDIT: Contrast this 175 EUR "lifetime pass" with no info with Battlefield Premium that had a EUR 50 price tag and a clear roadmap (with timings!) of five paid extensions plus (admittedly worthless) digital content like tactical guides, additional in-game gear and customization options. They even already added two major game overhaul patches plus an additional free extension for a two-year old game in a franchise that usually only updates the current of the annual "new" releases.