The figures should be in the 3.75" scale. The same as Star Wars. Not 6 damn inches! Hasbro has gotten HIGHLY superb at the sculpting, likenesses and high articulation of the current SW action figure line. The aforementioned being it's geared more toward the collectors.
I'm hoping the line also includes the various media Indy has been in including the films. The comics, video games, books. I'd like a figure of Sophia Hapgood. Hell, for each figure they should use the subtitle font for the name of the character. Except of course for Dr. Jones himself. Perhaps have the figures broken up in "waves"?
There should also of course be the mandatory troop builder aspect. Nazi's, Thugees, and many other worthwhile ones. And for vehicles, I'm assuming the ones based on WWII which are in the same scale from other toylines should suffice. Unless Hasbro is going to do a one over and give us vehicles with absolutely astounding details. Of course there'll be the undamaged and damaged variants and the like.
Only problem is the space to put all of these.