no, no, and no. Iguanas are very territorial. and the signs of dominance problems are really subtle in these guys. Have you ever seen iggs sleep on top of each other? the one on top is dominant. And the one that eats first? dominant. And that can stress the non-dominant one(s). They can appear to get along for a long time, then BOOM! you come home and one is injured or dead. I don't really mean to scare you or anything, but it is very risky to house them together. Is there a way you can stick dividers in the cage? At the VERY least, provide multiple basking, eating, and bathing areas. A trick that parakeet and cockatiel breeders use (when colony breeding) is to always provide more nest boxes than there are pairs, that way nobody fights (as much) over one. I'm sure there's folk here who have much more experience with this than I do. good luck!!! 
-katie