The war will shift when this takes place.
I personally know of 4 alliances who will jump aboard the TLF cause when this goes live. Most of them are prepping for it now.
Everything the Amarr have is already in the field, and has been for ages. 
No one is coming to back us up.
I presume the current balance of power in FW to be precarious already, Alliances or no. It's based on a fairly limited number of die-hards. While the militias are responsible for just as many PvP kills as the major nullsec blocs, low-sec is still one of the least-populated areas. And only a fraction of current militia members participate in or care about plexing.
It's looking more and more like CCP will kick off a major iteration of FW soon, either this summer or in rolling updates over the next few months. When that happens, expect both an influx of new pilots as well as renewed involvement by a lot of existing pilots who see the current occupancy mechanics (justifiably) as pointless.
In short, it's anyone's guess as to what the map will look like in six months.
