Yes indeed. Let me add my voice to everyone else out there in agreeing that - if Marvel Films and Robert Downey Jr. really ARE seriously considering Shane Black, writer of some of your favorite tough-guy movies of the last few decades and writer/director of the AWESOME RDJ mini-comeback"Kiss Kiss Bang Bang," as a candidate to replace John Favreau as writer/director of "Iron Man 3 - then HELL YES that should happen!
Normally I'd be given to dismiss the web-wide geekgasm over this sort of thing - sure, great idea, but no use getting worked up since our enthusiasm or worry can't really effect a hiring decision. But for better or worse, Marvel Films does things differently than other studios - not only would hiring an out-of-left-field "huh?" choice be in keeping with their practices up to this point, but don't forget that Marvel is widely believed to have picked Chris Evans for Captain America after "floating" his name made the geek-o-sphere go wild. So yeah, might as well get loud and try to get this awesomeness happening.