Lethal Weapon 5?

Ain't It Cool News report that Lethal Weapon 5 might be in the offing. I thought that LW4 was one too many. The only way that this project could have a hope is if Shane Black gets to write the entire script. I usee the superb Kiss Kiss Bang Bang as an example of Black's more recent successes. LW5 would have to be an R, in keeping with the tone of the originals, not some toned down PG-13 rubbish, with an unrated DVD - yes, like Die Hard 4.0!