I'm a HUGE Armored Core fan so I was naturally shocked to come across this thread. I did a bit of searching and here's what I found out:
The game will feature two disks titled either 'Past' and 'Future' or 'Evoltion' and 'Revolution'. 'Past' will contain a selection of missions from the previous instalments of the series, whereas 'Future' will house an entirely new game. Armored Core: Nexus is also rumoured to include online play using the PS2's network adaptor. (Sorry XBox owners (me included) there's no live support here).
Below is a link to Gamespot where they have 10 screenshots available. It doesn't look to disimilar to Armored Core 3, but any AC is better than no AC, right?
https://www.gamespot.com/ps2/action/a...reenindex.html