Not too long ago, Imagi set up this site to showcase their plans for T28. Basically, it's a revamped version of the first giant-robot anime ever, Tetsujin 28/Gigantor, plus a bit of Giant Robo/Johnny Sokko, which was made by the same guy.
Intros, in case you're new to this:
Tetsujin 28 (1964
Tetsujin 28 (2004)
Giant Robo (1993)
To be honest, I'm excited that Imagi's getting into Tetsujin, but I'm displeased what they've done to the human characters. Tetsujin and Black Ox look great, but Shotaro doesn't look remotely the same. (It's the hair and face that bother me mostly.) And Dr. Franken! He's done from being a timid old man who builds Black Ox to rival Tetsujin...to a gravely-voiced tyrant with an army of men with cone heads.

The story seems to be the standard stop-the-bad-man-from-taking-over-the-world kind of thing, but keeps Tetsujin's wartime origin. I really hope the rest of the characters look like their conventional designs...I can see Chief Otsuka and Dr. Shikishima going well, but Kenji Murasame (my favorite) might not get to keep his hair.