Apparently, Wild Arms 4 is going to be a PS2 remake of part 1. They aren't changing the script (except perhaps fixing a few errors), but the battle system's going to be refined a bit (probably end up like part 3's)
And here's the weirdest thing, 3 new party members:
spoilers said:
Emma, Calamity Jane and her sidekick
It's a shame I don't have a PS2. I played a small bit of WA3, and I liked it.
And Calamity Jane's sidekick is one of my favorite characters. But Calamity Jane herself annoys me profusely. And I like Emma, too.