[Jeritron]

AMH can't really be Robin. He's older than Bale and Ledger as far as I know. He was a teenager in the 80s while Christian Bale was like 7 in Empire of the Sun.
He also looks nothing like Robin, and I doubt Robin's going to be introduce during Nolans watch. Of course, I don't doubt for a second that Nolan and Bale will part with Batman after the 3rd or 4th movie and go onto other things. Either that or they'll get canned, and WB will amost surely repeat their mistakes and continue the continuity with all the unused characters and a new director/cast/mood.

AMH is possibly Edward Nigma working at Wayne Enterprises and they're going for that approach. Either that or he's a run of the mill normal character and nothing too special, and this is all just guerilla promotion and pointless hype. Probably the latter, since that's what actors do to promote movies they're in, even if they're not that important. All of that actors probably have confidentiality agreements, it doesn't mean they're future villians or well known characters. The 200 million suprise is probably the projected box office for TDK, and not some future draw. That's my two cents.