I agree with what Matt and Scott have mentioned, if we got a really nicely done, SA Indy figure - in 3 3/4" scale - I'd be a pretty happy camper. If we get other characters from all four movies, that's great too, and I'm excited that Hasbro's doing a line - but Indy alone would be great.
I was kind of surprised when I heard there was going to be an IJ line as well, since I don't remember seeing much in the past. I thought there was an outside chance of some sort of "exclusive" Indy figure, basically sold under the SW line or something (SWShop exclusive or something). Jesse brings up a good point though about this being such a collector's market anymore. There are a lot of lines out there now that are basically just supported by collectors, despite what toy companies want to say. Sure, things like the Spidey, Pirates, and most movie lines are primarily kiddos with some collectors, but there's a lot of "collector-only" lines out there now too. Anyways, that's been talked about to death already, but the collector does make up a good part of the market these days.
I'm really looking forward to the potential Indy line though, but I hope its done to its potential - and in the 3 3/4" scale. I'm thinking VTSC quality figures and a nice, well-rounded line. Hasbro sees the connection with Star Wars (and Star Wars fans), so hopefully they don't pull some 5" scale, action-feature laden crap with the line - but I wouldn't put it past that either.